{"id":358,"date":"2020-08-02T17:16:22","date_gmt":"2020-08-02T20:16:22","guid":{"rendered":"https:\/\/www.ige.unicamp.br\/pedologia\/?page_id=358"},"modified":"2026-03-09T17:07:01","modified_gmt":"2026-03-09T20:07:01","slug":"artigos-cientificos","status":"publish","type":"page","link":"https:\/\/www.ige.unicamp.br\/pedologia\/publicacoes\/artigos-cientificos\/","title":{"rendered":"Artigos cient\u00edficos"},"content":{"rendered":"\n
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\"\" Artigos Cient\u00edficos<\/strong><\/p>\n\n\n\n

\"\" Teses de Doutorado<\/a><\/strong><\/p>\n\n\n\n

\"\" Disserta\u00e7\u00f5es de Mestrado<\/a><\/strong><\/p>\n\n\n\n

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\"\" 2026<\/p>\n\n\n\n

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Diego Luciano Nascimento, Patr\u00edcia Colombo Mescolotti, Filipe Giovanini Varej\u00e3o, Francisco Sergio Bernardes Ladeira, Mario Luis Assine. Aptian sauropod undertracks in damp interdunes: Indicators of water table fluctuations in Southeast Brazil<\/strong>. <\/strong><\/span> Cretaceous Research, v. 184, 106345, 2026.<\/strong><\/p>\n\n\n\n

\"\"<\/a> ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

The Early Cretaceous sauropod track record in South America is scarce and largely restricted to fluvial and lacustrine environments. In contrast to this pattern, we document recurrent sauropod tracks and trackway in aeolian deposits of the Aptian Tr\u00eas Barras Formation in southeastern Brazil. The tracks are preserved in cross-sections of interdune deposits and record the activity of large-bodied dinosaurs, probably sauropods based on their size, morphology, and marked heteropody between pes and manus. The tracks and trackway reveal detailed evidence of interactions between producers and a soft and water-saturated substrate. The foot penetrated and deformed multiple layers, generating undertracks up to more consolidated beds and resulting in liquefied soft-sediment deformation structures. Well-developed marginal folds directed to the track center, massive and deformed sand infill, collapsed walls, and underlying dish and pillar structures suggest that the trackmakers walked on semi-liquid sediment, with the tracks being filled during and immediately after foot withdrawal (syn-track infilling). These features point to substrate saturation with the water table at or near the surface, suggesting that dinosaurs walk in damp interdunes during brief preservation windows with elevated water tables. Therefore, the occurrence of sauropod tracks and trackway in the Sanfranciscana Basin may indicate that these dinosaurs inhabited, or at least travelled in, a wet aeolian environment while moving toward more favorable habitats with greater resource availability. Moreover, this study reinforces that access to freshwater was a critical factor in sauropod foraging behavior, a requirement that appears to have been independent of the specific environmental settings, whether fluvial, aeolian, or coastal wetlands. <\/div>\n\n\n\n

Palavras-chave: <\/strong>Dinosaur tracks fossil footprints; Dinoturbation; Ichnology; Sanfranciscana Basin; Tr\u00eas Barras Formation.<\/p>\n<\/div><\/div>\n<\/blockquote>\n\n\n\n

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\"\" 2025<\/p>\n\n\n\n

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Diego Luciano Nascimento, Patr\u00edcia Colombo Mescolotti, Francisco Sergio Bernardes Ladeira, Mario Luis Assine. Cretaceous tetrapod burrow from Aptian eolian deposits of Southeast Brazil<\/strong>. <\/strong><\/span> ICHNOS, v. 32, n2025.<\/strong><\/p>\n\n\n\n

\"\"<\/a> ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

This paper describes a tetrapod burrow from the Cretaceous Tr\u00eas Barras Formation (Sanfranciscana Basin, Brazil). The burrow preserved in aeolian sandstone has as a lateral cross-section, displaying a sinuous, unbranched ramp structure with a downward-increasing tunnel diameter. The burrow measures 64\u2009cm in length, with a width ranging from 3.8\u2009cm in the upper segment to 6.2\u2009cm at its widest point near the terminal chamber. The uppermost portion features a 12.0\u2009cm-wide, sand-filled conical enlargement. The sub-circular terminal chamber has a diameter of 11.0\u2009cm and lacks branches or secondary ramifications. The burrow is passively filled and disrupts the original bedding of the aeolian dunes, with a sharp, irregular contact with the substrate marked by ridges (0.3\u20131\u2009cm length). Based on its morphology, including a slightly inclined ramp terminating in a chamber, irregular walls, and surficial ridges indicative of a scratch-digging mechanism, the most plausible tracemaker is a small tetrapod. The paleontological record of the Tr\u00eas Barras Formation, which includes small reptiles, suggests a small lizard as a potential producer. Nevertheless, due to the scarcity of data, small mammals cannot be entirely ruled out as trace-makers, given the structure similarities to both fossil and extant mammalian burrows. The sedimentary context and arid paleoenvironmental conditions suggest this burrow may have served as a thermoregulatory function in interdune deposits. The preservation of irregular ridges indicates excavation in a moist, cohesive substrate, implying burrowing activity during humid periods near the base of the dune, close to a high-water table. This study represents an important contribution to the record of Cretaceous tetrapod burrows, a period when such trace fossils are particularly scarce. <\/div>\n\n\n\n

Palavras-chave: <\/strong>Continental ichnology; Tr\u00eas Barras Formation; Paleoecology; Bioturbation; Fossoriality; Sanfranciscana Basin.<\/p>\n<\/div><\/div>\n<\/blockquote>\n\n\n\n

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Christian F. Colman, Oscara A. Mart\u00ednez, Francisco S.B. Ladeira, Jorge Rabassa, Narciso Cubas, Emilia Y. Aguilera, Yennifer Sarubbi Jacks, Edher Z. Herrera, Magna M. Monteiro, Chirstian S\u00e1nchez. Geomorfolog\u00eda y paleosuperficies gondw\u00e1nicas en el Paraguay central<\/strong>. <\/strong><\/span> Bolet\u00edn de la Sociedad Geol\u00f3gica Mexicana, 77 (3), A091025, 2025.<\/strong><\/p>\n\n\n\n

\"\"<\/a> ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

In central Paraguay, a total of 207 relict planar surfaces have been identified, in some of which both major and minor relictual forms of weathering, as well as remnants of deep chemical weathering profiles, have been preserved. They are therefore considered remnants of etchplains. These smooth planar forms, distributed along the different tectonic blocks bordering the Asuncion-Sapucai-Villarrica Rift (ASVR), are the result of deep chemical weathering of igneous rocks and Paleozoic and Mesozoic sedimentary rocks. This is followed by subsequent exhumation and erosion from the Late Cretaceous to the Eocene. This study describes and interprets representative sites of these Gondwanan paleosurfaces, including granitic and pseudogranitic landscapes. It analyzes singular examples such as the \u201cPiedra Equilibrista de Paso Carreta (PEPC)\u201d, and presents a geomorphological map that constitutes the first cartographic product on this subject at a regional scale for the studied area. <\/div>\n\n\n\n

Palavras-chave: <\/strong>planation surfaces, deep chemical weathering, etchforms, lateritic profiles, pseudogranitic landscape.<\/p>\n<\/div><\/div>\n<\/blockquote>\n\n\n\n

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Diego Luciano Nascimento, Renata Guimar\u00e3es Netto, Marcello Guimar\u00e3es Sim\u00f5es, Francisco Sergio Bernardes Ladeira, Mario Luis Assine. The record of Scalichnus<\/em> ichnofabrics in ancient fluvial settings and its paleoecological significance<\/strong>. <\/strong><\/span> Scientific Reports, 15, 37588, 2025.<\/strong><\/p>\n\n\n\n

\"\"<\/a> ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

Bivalves are a dominant group of benthic invertebrates in freshwater ecosystems playing significant ecological roles in fluvial and marginal lacustrine environments. Despite being active burrowers, the traces left by freshwater bivalve mollusks are less studied and documented than those of their marine counterparts, both in modern and ancient records. In this study, we provide a detailed description of a bivalve ichnofabric primarily characterized by Scalichnus found in fluvial deposits of the Cretaceous Exu Formation, Araripe Basin, northeastern Brazil. Most preserved traces exhibit menisci or irregular concave-upwards laminae at the base of the oval chamber, indicating upward displacement in response to sediment aggradation. Additionally, the presence of stacked Scalichnus in the sandbars suggests that bivalves repositioned themselves upward in the substrate during episodic or seasonal sediment accumulation. In some cases, stacked Scalichnus extend over 60 cm, indicating multiple aggradation events under low deposition rates, which likely allowed the animals to survive these depositional changes. In this context, the preservation of Scalichnus ichnofabrics is associated with variations in sedimentation rates driven by climatic seasonality. These fluctuations likely required the upward repositioning of the bivalves in response to substrate aggradation. <\/div>\n\n\n\n

Palavras-chave: <\/strong>Bioturbation, Freshwater mollusks, Climate seasonality, Continental ichnology<\/p>\n<\/div><\/div>\n<\/blockquote>\n\n\n\n

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Diego Luciano Nascimento, Francisco Sergio Bernardes Ladeira. Cretaceous biological soil crusts: a glimpse of ancient dryland microbial life and soil development<\/strong>. <\/strong><\/span> Catena, 259, 109390, 2025.<\/strong><\/p>\n\n\n\n

\"\"<\/a> ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

Biological soil crusts (BSCs) are bio-sedimentary structures that play vital ecological roles in modern extreme environments. As microbial communities thriving in disturbed settings under hydrological stress and erosion, they function as both ecosystem engineers and pioneer colonizers of bare soils, particularly in arid and polar regions. Despite their significance for soil development and ecological succession and their widespread occurrence in contemporary environments, BSCs remain markedly underrepresented in paleopedological records. This study presents a detailed macro and micromorphological analysis of Cretaceous biological soil crusts preserved in paleosols of Mar\u00edlia Formation (Bauru Basin, Brazil), elucidating their biogenic origin and paleoenvironmental significance. The studied crusts exhibit characteristic microbial sedimentary structures, including wrinkle marks, gas domes, fenestral porosity, and desiccation cracks, alongside well-preserved coccoid microbial filaments, extracellular polymeric substances (EPS), and carbonate spherulites. These features closely resemble modern humipedons, particularly crusto-humus systems characterized by organic (CruO) and organo-mineral (CruOA) AC horizons. Such structures reflect enhanced organic matter accumulation and biological activity during soil development, further supporting their interpretation as cyanobacteria-dominated microbial mats (BSCs) that stabilized floodplain. Micromorphological and SEM analyses confirm bioweathering signatures, calcified root cells, and microbial-induced CaCO3 precipitation, reinforcing their biogenicity. The association of BSCs with rhizoliths and invertebrate trace fossils indicates periods of landscape stability and incipient ecological succession following sedimentary deposition. Paleoenvironmental reconstruction points to seasonally semi-arid conditions punctuated by intermittent flooding events, with BSCs developing during intervals of subaerial exposure. This study underscores the significance of BSCs for interpreting paleosols and sedimentation dynamics, providing new insights into Cretaceous terrestrial ecosystems. <\/div>\n\n\n\n

Palavras-chave: <\/strong>Paleosols; Humus system; Humipedon; Extracellular polymeric secretions (EPS); Marilia formation<\/p>\n\n\n\n

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Alessandro Batezelli, Francisco Sergio Bernardes Ladeira, Leidy Alexandra Delgado Blanco, M\u00e1rcio Luiz da Silva, Taynah Buratto Rebelo. Geomorphological control on the palaeosol evolution in an Upper Cretaceous distributive fluvial system (Bauru Basin, Brazil)<\/strong>. <\/strong><\/span> Catena, 258, 109278, 2025.<\/strong><\/p>\n\n\n\n

\"\"<\/a> ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

In the last three decades, palaeopedology has been used as a critical methodology for the study of fluvial systems, allowing the identification of specific features related to non-depositional times (such as tectonic, climate, topography, and organisms). The Mar\u00edlia Formation records the distributive fluvial system (DFS) stage of the Bauru Basin (Southeastern Brazil) during the Maastrichtian, dominated by braided river deposits. Based on the relationship between facies and palaeosols, the present work proposes an environmental evolution and estimates the rate of sedimentation and pedogenesis in the Late Cretaceous of Southeast Brazil. By studying bi-dimensional sections, we identified facies associations that compound four main architectural elements: channels (CH), laminated sand sheet (LS), sand bars (SB) and overbank deposits (OF). The sedimentary dynamics were marked by the building and abandoning of channel complexes related to aggradation, carbonate palaeosols generation, clay illuviation, and vegetation growth within the channels. Fifteen palaeosol profiles occur intercalated in the deposits. They are characterised by horizons Bt, Btk, Bss, C, and Ck, which allows a possible general comparison with the present soil orders: Alfisols, Aridisols, Entisols, and Vertisols. The macro- and micromorphological characteristics, combined with the mineralogy of these horizons, indicate arid and semiarid climatic conditions, with the minimum time of profile formation varying from 3740 to 5000 years. The genetic relationship between architectural elements, palaeosols, and the piling pattern suggests that the Mar\u00edlia Formation resulted from a succession of high-frequency depositional events of 103 to 104 years. This approach may allow an understanding of the avulsion and pedogenesis processes in the distal distributive fluvial systems. <\/div>\n\n\n\n

Palavras-chave: <\/strong>Sedimentation; Palaeosols; Fluvial geoforms; Geomorphology; Upper Cretaceous<\/p>\n<\/div><\/div>\n<\/blockquote>\n\n\n\n

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Jefferson Gomes Confessor, Lara Lu\u00edza Silva, Diego Fernandes Terra Machado, Idelvone Mendes Ferreira, Francisco Sergio Bernardes Ladeira, Silvio Carlos Rodrigues. Din\u00e2mica H\u00eddrica do Solo de Campo de Murundus do Parque Nacional da Serra da Canastra – MG<\/strong>. <\/strong><\/span> Revista Brasileira De Geografia F\u00edsica, 18(1), 181\u2013199, 2025.<\/strong><\/p>\n\n\n\n

\"\"<\/a> ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

Cerrado apresenta ao longo de sua \u00e1rea de ocorr\u00eancia diferentes fitofisionomias, destacando-se entre estas as \u00e1reas de Campos de Murundus. Devido a crescente substitui\u00e7\u00e3o do Cerrado por atividades agropecu\u00e1rias, torna-se necess\u00e1rio seu estudo para garantir a prote\u00e7\u00e3o de suas funcionalidades biogeogr\u00e1ficas. Este estudo objetivou compreender as caracter\u00edsticas f\u00edsico-h\u00eddricas de uma \u00e1rea de Murundus inserida no Parque Nacional da Serra da Canastra, utilizando-se para tal um simulador de chuvas e um infiltr\u00f4metro de inunda\u00e7\u00e3o, correlacionando os dados produzidos com as condi\u00e7\u00f5es paisag\u00edsticas do ambiente. Os dados coletados revelaram que o Campo de Murundus apresentou alta capacidade de infiltra\u00e7\u00e3o, exibindo altos valores de velocidade b\u00e1sica de infiltra\u00e7\u00e3o-VIB (115,44mm\/h), estando estes volumes intimamente ligados \u00e0 presen\u00e7a atuante da pedofauna no solo, caracterizada principalmente pela a\u00e7\u00e3o das t\u00e9rmitas, as quais atrav\u00e9s de seus h\u00e1bitos de vida imprimiram sobre os solos certas caracter\u00edsticas, incrementando sua porosidade atrav\u00e9s da densa rede de tuneis escavados, selecionando materiais e estratificando camadas de alta porosidade pr\u00f3ximas a superf\u00edcie. A alta incorpora\u00e7\u00e3o de \u00e1gua na \u00e1rea estudada indica que os Campos de Murundus se comportam como grandes \u00e1reas de capta\u00e7\u00e3o de \u00e1gua das chuvas, consolidando-os como \u00e1reas estrat\u00e9gicas de prote\u00e7\u00e3o, visto sua import\u00e2ncia ecol\u00f3gica e de seguran\u00e7a h\u00eddrica. <\/div>\n\n\n\n

Palavras-chave: <\/strong>Covoais; Infiltra\u00e7\u00e3o; Cerrado; Simulador de chuvas<\/p>\n<\/div><\/div>\n<\/blockquote>\n\n\n\n

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Diego Luciano Nascimento, Francisco Sergio Bernardes Ladeira. Memories of the deep past: The importance of the soil memory concept for paleopedology studies<\/strong>. <\/strong><\/span> Catena v.254, n.30 (2025) 108945.<\/strong><\/p>\n\n\n\n

\"\"<\/a> ARTIGO<\/a><\/strong> ABSTRACT<\/strong><\/span>

Paleopedology is an interdisciplinary and historical scientific field focused on the study of fossil soils and ancient landscapes. Like other historical sciences such as geology and paleontology, paleopedology works with incomplete datasets and preservation biases. Despite these challenges, paleosols provide valuable paleoenvironmental, paleobiological, and paleoecological data, allowing for inferences about past events and entities. The aim of this paper is to engage in a reflective exercise on the role played by the soil memory concept as an epistemic tool to overcome contingency, underdetermination, and equifinality\u2014common phenomena within historical sciences\u2014in interpretation of paleosols. The soil memory concept is related to the capacity of soil record information about soil forming factors and pedogenic processes in their characteristics. This work discusses how soil memory serves as a conceptual and methodological framework that facilitates the establishment of analogical reasoning in paleopedology. Soil memory in paleopedology identifies regularities between paleosols and soils, linking different pedogenic characteristics and processes across various spatial and temporal scales, thereby allowing paleoenvironmental explanation. Soil memory provides an \u2019experimental context\u2019 to emphasize the observed regularities between different objects, such as Precambrian and Quaternary paleosols at different scales. Soil memory is not a definitive explanation but rather an open, dynamic, and exploratory tool that helps guide subsequent research steps and refine questions based on weak and in some cases unrelated evidence. Recent years have seen increased interest in the capacity of historical sciences, particularly geology and paleontology, to provide comprehensive explanations for complex events from the deep past. Integrating paleopedology into this discussion enhances our understanding of how scientific knowledge about past environments is constructed, and how the historical sciences contribute to scientific explanations. <\/div>\n\n\n\n

Palavras-chave: <\/strong>Impactos; uso e manejo do solo; mata ciliar; relevo; precipita\u00e7\u00e3o<\/p>\n<\/div><\/div>\n<\/blockquote>\n\n\n\n

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\"\" 2024<\/p>\n\n\n\n

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Renata Santos Momoli, Francisco Sergio Bernardes Ladeira, Vladia Corrchel, Miguel Cooper. Din\u00e2mica da sedimenta\u00e7\u00e3o e eros\u00e3o em uma zona rip\u00e1ria do Cerrado no estado de Goi\u00e1s, Brazil<\/strong>. <\/strong><\/span> Revista Geografia, v.49, n.01 (2024) 628-653.<\/strong><\/p>\n\n\n\n

\"\"<\/a> ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

A eros\u00e3o do solo provoca efeitos negativos ecossist\u00eamicos e econ\u00f4micos, dessa forma as pr\u00e1ticas de uso e manejo do solo de preven\u00e7\u00e3o e controle de eros\u00e3o devem considerar as caracter\u00edsticas locais do solo, relevo, vegeta\u00e7\u00e3o e hidrologia. Este estudo buscou elucidar a din\u00e2mica de deposi\u00e7\u00e3o de sedimentos em uma zona rip\u00e1ria, resultante da eros\u00e3o em Latossolo Vermelho distrof\u00e9rrico argilosocultivado com soja. O n\u00edvel da superf\u00edcie foi monitorado por pinos de eros\u00e3o e a intensidade e volume de chuva foram medidos com pluvi\u00f4metro de b\u00e1scula durante 17 meses. Considerando o balan\u00e7o entre deposi\u00e7\u00e3o e eros\u00e3o, predominou a deposi\u00e7\u00e3o de sedimentos(m\u00e9dia 4,59 cm)apesar da alta variabilidade espa\u00e7o-temporal dada pelo coeficiente de varia\u00e7\u00e3o m\u00e9dio de 113%. Apesar da distribui\u00e7\u00e3o irregular, foi observada a tend\u00eancia decrescente de deposi\u00e7\u00e3o de sedimentos da borda para o interior da floresta rip\u00e1ria e aumento da eros\u00e3o no interior da floresta, com perdas de solo m\u00e9dia de -4,40cme m\u00e1xima de-14,00 cm. O aumento da cobertura vegetal protetora do soloreduziu o aporte de sedimentos na borda e no interior da zona rip\u00e1ria, pela diminui\u00e7\u00e3o da eros\u00e3o do terreno cultivado na encosta a montante, importante principalmente durante o per\u00edodo chuvoso em regi\u00f5es tropicais. <\/div>\n\n\n\n

Palavras-chave: <\/strong>Impactos; uso e manejo do solo; mata ciliar; relevo; precipita\u00e7\u00e3o<\/p>\n<\/div><\/div>\n<\/blockquote>\n\n\n\n

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Douglas Silva Cabral; Francisco Sergio Bernardes Ladeira. Caracteriza\u00e7\u00e3o pedol\u00f3gica de duas vertentes na bacia do Rio Gurutuba, em Ita\u00f3ca, SP<\/strong>. <\/strong><\/span> Revista Brasileira de Geografia F\u00edsica v.17, n.03(2024) 1543-1559.<\/strong><\/p>\n\n\n\n

\"\"<\/a> ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

O Brasil tem como principal causador de desastres naturais, os movimentos gravitacionais de massa e dentre estes, os deslizamentos se destacam. Nesse contexto, a regi\u00e3o geomorfol\u00f3gica denominada Serra do Mar, entre os estados do Paran\u00e1 e Rio de Janeiro, \u00e9 cotidianamente afetada por desastres naturais e, principalmente, deslizamentos de solos. Desta forma, este trabalho busca, caracterizar pedol\u00f3gicamente diferentes encostas e determinar fatores que possam influenciar a ocorr\u00eancia dos deslizamentos de forma n\u00e3o uniforme entre as vertentes. Para isso, o estudo baseou-se na caracteriza\u00e7\u00e3o de solos atrav\u00e9s de an\u00e1lises t\u00e1til-visual de campo e ensaios de caracteriza\u00e7\u00e3o geot\u00e9cnica no munic\u00edpio de Ita\u00f3ca, SP, na regi\u00e3o conhecida como Vale do Ribeira e inserida no dom\u00ednio da Serra do Mar. A regi\u00e3o foi selecionada devido sua geomorfologia com encostas \u00edngremes e que registraram in\u00fameros deslizamentos planares no evento chuvoso ocorrido em janeiro de 2014, quando chuvas torrenciais nas bacias dos rios Guarda-M\u00e3o e Gurutuba, deflagaram um grande n\u00famero de deslizamentos, ocasionando corridas de detritos e ceifando aproximadamente 25 vidas no mun\u00edcipio. Assim, acredita-se ser poss\u00edvel analisar as caracter\u00edsticas de diferentes solos de encostas pr\u00f3ximas e que foram atingidas igualmente pelas chuvas, mas registraram um n\u00famero desigual de deslizamentos. <\/div> <\/p>\n\n\n\n

Palavras-chave: <\/strong>Pedologia; Solos; Suscetibilidade; Deslizamentos<\/p>\n<\/blockquote>\n\n\n\n

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Pedro Michelutti Cheliz; Francisco Sergio Bernardes Ladeira; Jo\u00e3o Carlos Moreno de Sousa; Juliana Alves Rodrigues; Paulo C\u00e9sar Fonseca Gianini; Gabriela Sartori; Danilo Galhardo; Robson Antonio Rodrigues. Din\u00e2mica geomorfol\u00f3gica, pedol\u00f3gica e ocupa\u00e7\u00e3o humana inicial no vale do rio Moji-Gua\u00e7u no pleistoceno tardio e holoceno (S\u00e3o Paulo, Brasil)<\/strong>. <\/strong><\/span> CADERNO DE GEOGRAFIA, v. 34, p. 142-184, 2024.<\/strong><\/p>\n\n\n\n

\"\"<\/a> ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

Apresenta-se a caracteriza\u00e7\u00e3o geomorfol\u00f3gica, pedol\u00f3gica, cronol\u00f3gica e arqueol\u00f3gica de um segmento assim\u00e9trico do m\u00e9dio vale do rio Moji-Gua\u00e7u, no entorno de um s\u00edtio arqueol\u00f3gico l\u00edtico, com o objetivo dediscutir o contexto de transforma\u00e7\u00f5es ambientais e do relevo da \u00e1rea no Quatern\u00e1rio Tardio. O estudo baseia-se em mapeamento geomorfol\u00f3gico e unidade de escava\u00e7\u00e3o, feita numa vertente truncada por terraplanagem da ordem de 1,8 a 5 m. Descreveram-se sucess\u00e3o sedimentar e perfis de solos, com coleta de amostras para an\u00e1lises qu\u00edmica, granulom\u00e9trica, micromorfol\u00f3gica e data\u00e7\u00e3o por LOE, est\u00e1em tr\u00eas profundidades (25, 55 e 85 cm). Duas sucess\u00f5es de dep\u00f3sitos arenosos foram reconhecidas, cada uma delas associada a solo produzido sob intemperismo intenso. Na primeira sucess\u00e3o, obteve-se idade LOE de 20,3 mil anos, e, na segunda, idades de 17,2 e 11,4 mil anos. Artefatos arqueol\u00f3gicos (lascas e detritos de quartzo, silexito e arenito) foram encontrados em meio \u00e0 segunda sucess\u00e3o, entre 30 e 60 cm de profundidade, caracterizando paleossuperf\u00edcies que se formaram em meio a sucessivas deposi\u00e7\u00f5es coluviais. Interpreta-se que antigos grupos humanos se instalavam em vertentes e buscavam, nas plan\u00edcies fluviais pr\u00f3ximas, os seixos usados para a confec\u00e7\u00e3o de seus artefatos l\u00edticos. Registrou-se, ainda, que em um intervalo de tempo que incluiu o Holoceno, os dep\u00f3sitos e solos de col\u00favios vertentes foram seccionados pelo rio Moji-Gua\u00e7u, criando escarpas obtusas e de elevados(>40 m) desn\u00edveis verticais locais na margem esquerda do rio, como resultado de mudan\u00e7as horizontais (1200 m) e verticais (10 m) da posi\u00e7\u00e3o do leito fluvial, que levaram \u00e0 configura\u00e7\u00e3o atual assim\u00e9trica da sua plan\u00edcie e das vertentes adjacentes. <\/div>\n\n\n\n

Palavras-chave: <\/strong>evolu\u00e7\u00e3o devertentes, geoarqueologia, LOE, geomorfologia fluvial, paleopedologia, Quatern\u00e1rio<\/p>\n<\/div><\/div>\n<\/blockquote>\n<\/div><\/div>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n

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\"\" 2023<\/p>\n\n\n\n

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Diego Luciano Nascimento, Mariane Chiapini, Pablo Vidal-Torrado, Jonathan D. Phillips, Francisco Sergio Bernardes Ladeira, Diego Fernandes Terra Machado, Roberto da Silva Camargo, Everton Vin\u00edcius Valezio. The underestimated role of leaf-cutting ants in soil and geomorphological development in neotropical America.<\/strong><\/span> EARTH-SCIENCE REVIEWS, v. 248, p. 104650, 2023.<\/strong><\/p>\n\n\n\n

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\"\"<\/a> ARTIGO<\/a><\/strong> ABSTRACT<\/strong><\/span>

Leaf-cutter ants belonging to the genus Atta<\/em> are important ecosystem engineers and conspicuous bioturbators in Neotropical regions<\/a> acting as superorganisms. The Atta<\/em> ants excavate impressive and long-lived nests with complex subterranean systems that provide shelter from predation and climatic extremes and allow reproduction and fungus-growing. Despite their importance and the large body of literature on the ecology of Atta<\/em> ants, their role in geological processes<\/a> is still poorly studied and underestimated compared to other soil invertebrates<\/a> such as termites and earthworms. In this work, based on interdisciplinary literature and examples from South America, we provide a systematic review of the main mechanisms and processes by which the leaf-cutter ants direct and indirectly affect the soil characteristics and properties, and also their impact on surficial geological and geomorphological processes at different scales. We also highlight how specific digging and transport processes, such as biomixing, biosorting, biotransfer, and biodeposition affect pedogenesis<\/a> and landform<\/a> development. We highlight how the soil turnover and mounding processes create different surficial landforms that are easily eroded and reworked along the slopes by runoff. In the subsurface, the digging behavior results in soil sorting and biogenic microaggregates<\/a> development that increase soil porosity<\/a>, with implications for water-holding capacity. The subterranean system creates preferential flux pathways that increase the leaching processes and the complexity of weathering fronts in Atta<\/em>-bioturbated soils. The impact of the bioturbation<\/a> of leaf-cutting ants can reach >5 m deep, composed mainly of biofabrics, such as biopores with loose or dense infillings, clay linings, mamillated vugs, excrements, oval granular and rounded microaggregates with biotic origin at great depths (> 2 m). These impacts indicate long-term bioturbation by ants that can result in different soil development pathways. Long-term Atta<\/em> bioturbation can result in soil homogenization (proisotropic soil development) or create textural contrasts between the soil horizons associated with stone-layers (proanisotropic soil development) through fine material transport from the subsurface. Besides the physical modifications, the Atta<\/em> nests are biogeochemical hot spots or \u2018islands of fertility\u2019 that increase the habitat quality and growth and affect vegetation patterns through changes in the biotic and abiotic components of soils via nutrient concentrations. The Atta<\/em> nests affect chemical weathering patterns due to presence of fungal and waste chambers that change the soil pH and CO2<\/sub> concentration. The impact of leaf-cutting ants in landscape development is an expression of the long-term bioturbation activities and their cumulative impacts (multiple generations) on earth surface processes<\/a>.<\/div> <\/p>\n\n\n\n

Keywords: <\/strong>Attini; Entomolandforms; Biogemorphology; Ichnoentomology; Dynamic denudation; Biomantle; Bioweathering; Tropical geomorphology<\/p>\n<\/blockquote>\n\n\n\n

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M\u00e1rcio Luiz da Silva, Alessandro Batezelli, Francisco Sergio Bernardes Ladeira. Palaeosols as stratigraphic proxies and palaeosurface markers in distributive fluvial systems.<\/strong><\/span> JOURNAL OF SOUTH AMERICAN EARTH SCIENCES, v. 127, p. 104318, 2023.<\/strong><\/p>\n\n\n\n

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\"\"<\/a> ARTIGO<\/a><\/strong> ABSTRACT<\/strong><\/span>

Palaeosols<\/a> can be used as stratigraphic proxies, palaeosurface<\/a> indicators, and palaeorelief reconstitution tools, as they reflect a complex interrelationship between sedimentation, erosion, non-deposition, and pedogenesis<\/a>. The objective of the article was to estimate the relative time of formation of palaeosols of the Mar\u00edlia Formation, to determine the periods of non-deposition and non-erosion, indicative of stabilities on the surfaces, and to interpret the profiles as markers of palaeosurfaces in distributive fluvial systems (DFS) of the Late Cretaceous<\/a> of Brazil. Eleven sections of the Mar\u00edlia Formation (S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, and S11) were described, comprising forty-three profiles. The pedotypes classification (polygenic, compound, and cumulative) and the determination of palaeosols’ relative formation time and residence time were based on the specialized literature. The reconstitution of pedosedimentary cycles considered the dynamics of sedimentation, erosion, and pedogenesis. Eight sedimentary cycles and 45 pedosedimentary cycles were interpreted. All the Maastrichtian<\/a> pedosedimentary cycles of the Bauru Basin corresponded to depositional cycles interspersed with erosive and pedogenic processes. Palaeosols with argillic (Btk, Bt, Bss) and calcic (Bkm) horizons, developed from fluvial sandstones, evolved in processes predominantly after the deposits, with later erosive processes. However, although most of the profiles developed in periods between deposits and erosion, pedogenic processes also occurred concomitantly with the sedimentary cycles, favouring the formation of polygenetic profiles, which presented the longest pedogenic cycles in chronological terms. Palaeosols with argillic horizons can be important stratigraphic landmarks. They represent stopping moments in erosion and sedimentation of up to 1.374 My, thus consisting of the closing of high-frequency depositional cycles. Although palaeosols can demonstrate relief inversion and pedotypes with Bt-horizons can indicate ancient regional surfaces, the complete reconstitution of the topography becomes more possible at the local level, in a palaeoslope approach, due to the variability of pedofacies.<\/div> <\/p>\n\n\n\n

Keywords: <\/strong>Maastrichtian; Mar\u00edlia formation, Pedosedimentary cycles, Pedotypes, Relative formation time<\/p>\n<\/blockquote>\n\n\n\n

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Diego Luciano Nascimento, Renata Guimar\u00e3es Netto, Alessandro Batezelli, Francisco S\u00e9rgio Bernardes Ladeira, Daniel Sedrok. Taenidium barretti ichnofabric and rainfall seasonality: Insights into dryland suites of Scoyenia ichnofacies.<\/strong><\/span> Journal of Palaeogeography-English, v. 12, p. 28-49, 2023.<\/strong><\/p>\n\n\n\n

\"\"<\/a> ARTIGO<\/a><\/strong> ABSTRACT<\/strong><\/span>

The present work analyzes the monotypic Taenidium barretti<\/em> ichnofabric<\/a> developed in abandoned channels and floodplains<\/a> to understand its paleoecological significance in highly seasonal fluvial systems. The data come from the Cretaceous paleosols<\/a> of the Mar\u00edlia Formation (Bauru Basin, SE Brazil), in which the T. barretti<\/em> ichnofabric and rhizoliths represent the biotic record. Beetle larvae are considered to be the most likely T. barretti<\/em> tracemakers in these paleosols. The intensity and recurrence of bioturbation<\/a> suggest that the windows of opportunity for beetle population growth were very short and controlled by the progressive substrate desiccation after flood cessation. The characteristics of the trace fossil<\/a> assemblage suggest soil colonization by r-strategic organisms triggered by flooding events that provided the resource inputs necessary for their living during rainy seasons. The results also show that in fluvial systems with high discharge variations, the boundaries between a \u201cpre-desiccation suite\u201d and a \u201cdesiccation suite\u201d in the Scoyenia<\/em> ichnofacies<\/a> can be diffuse due to the short duration of colonization windows and progressive terrestrialization of floodplains and channels. Therefore, the frequency of flooding events, the lowered water table, and the rapidity of substrate desiccation constrained colonization by other burrowers and may be considered as first-order factors controlling the generation of a monotypic T. barretti<\/em> ichnofabric. Thus, the monotypic Taenidium<\/em> ichnofabric in the Scoyenia<\/em> ichnofacies context is an ichnomarker of brief windows for colonization in highly seasonal environments.<\/div> <\/p>\n\n\n\n

Keywords: <\/strong>Ichnology; Paleopedology; Continental ichnofacies; Meniscate burrows; Ichnofabric<\/p>\n<\/blockquote>\n\n\n\n

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Patricia Colombo Mescolotti, Paulo C\u00e9sar Fonseca Giannini, Fabiano do Nascimento Pupim, Andr\u00e9 Oliveira Sawakuchi, Francisco S\u00e9rgio Bernardes Ladeira, Mario Luis Assine. The largest Quaternary inland eolian system in Brazil: Eolian landforms and activation\/stabilization phases of the Xique-Xique dune field.<\/strong><\/span> GEOMORPHOLOGY, v. 420, p. 108516, 2023.<\/strong><\/p>\n\n\n\n

\"\"<\/a> ARTIGO<\/a><\/strong> ABSTRACT<\/strong><\/span>

Eolian systems are sensitive to vegetation and climate changes, but also to the sediment supplied by neighbor depositional systems. This sensitivity is manifested in the alternation between periods of sand dune<\/a> mobility and stability. In the Xique-Xique eolian system, the largest Quaternary interior dune field<\/a> in Brazil (\u223c8000 km2<\/sup>), the neighboring depositional system responsible for the sand supply is the S\u00e3o Francisco River. We interpreted periods of dune activity and stabilization by mapping eolian landforms<\/a> of this system, describing depositional facies under them and dating by optically stimulated luminescence (OSL-SAR). The stabilized parabolic landforms characterized and mapped (all formed by SE to E winds) were simple megadunes (25.5 \u00b1 4.4 to 5.8 \u00b1 2.0 ka), compound dunes (15.8 \u00b1 1.2 to 5.2 \u00b1 1.4 ka) and perched dunes (14.0 \u00b1 1.0 and 1.2 \u00b1 0.1 ka). We also recognized eolian plains (14.0 \u00b1 2.1 to 6.5 \u00b1 0.7 ka) and active parabolic dunes. Eolian deposits<\/a> of undifferentiated landforms have also been described and dated (253.8 \u00b1 19.0 to 8.2 \u00b1 1.3 ka). The ages obtained allowed identification of two main phases of dune activity (\u223c60 to 18 ka and \u223c16 to 5 ka) separated by a short period of stabilization marked by a paleosol<\/a> (\u223c18 ka). The main periods of eolian activity<\/a> are associated with phases of fluvial aggradation<\/a> and high sediment supply, whereas dune stabilization since 5 ka is correlated with low sediment supply during the Late Holocene<\/a> fluvial incision phase. The periods of eolian activity and stabilization respond not only to climate changes in the area occupied by the eolian system but mainly to local fluvial sediment<\/a> supply by the river, which in turn can respond to more regional climatic controls. The Xique-Xique eolian system results from the coupling of abundant sediment supply from the fluvial system, high eastern wind speeds<\/a>, and a significant wind deceleration caused by mountains on the western border of the dune field.<\/div> <\/p>\n\n\n\n

Keywords: <\/strong>Parabolic dune; OSL dating; Fluvio-eolian interaction; Sand supply<\/p>\n<\/blockquote>\n\n\n\n

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Pedro Michelutti Cheliz, Paulo Cesar Fonseca Giannini, Jo\u00e3o Carlos Moreno de Sousa, Francisco Sergio Bernardes Ladeira, Juliana Alves Rodrigues, Gabriela Sartori Mingatos, Fabiano Nascimento Pupim, Thays Desiree Mineli, Danilo Galhardo, Robson Antonio Rodrigues. Early anthropic occupation and geomorphological changes in South America: human-environment interactions and OSL data from the Rinc\u00e3o I site, southeastern Brazil.<\/strong><\/span> Journal of quaternary science, 1-17, 2023.<\/strong><\/p>\n\n\n\n

\"\"<\/a> ARTIGO<\/a><\/strong> ABSTRACT<\/strong><\/span>

This article aims to refine the description of the artefacts and the geomorphological, geological, pedological and chronological (optically stimulated luminescence (OSL) analyses of sedimentary deposits) characterisation of the Rinc\u00e3o I site (southeastern Brazil) to contribute to the understanding of early human\u2013environment interactions. The archaeological site occupation took place on hillslopes truncated by the Mogi-Gua\u00e7u River\u2019s lateral (~1200\u2009m) and vertical (~5\u2009m) movements during the Late Quaternary, in an area where in situ bedrock outcrops are uncommon. This geological context favoured human groups simultaneously having access to the resources provided by the alluvial plain and hillslopes. Here we describe how about three hundred lithic artefacts are associated with soils that originated from sandy colluvium with OSL ages between 20.3 and 5.5 thousand years. These ages are consistent with the local palaeopedological and geomorphological contexts of landscape changes, and partly controversial from the perspective of models currently in vogue for the human occupation of southeastern Brazil. The vestiges of past human presence amid the hillslope sandy colluvium deposits include: 1) a set of flakes and formal artefacts (one stemmed point and three convex artefacts) made of sandstone obtained from hillslopes near (<10\u2009km) the site; and 2) predominant detritus and flakes of quartz and flint obtained mostly from the adjacent (<1.5\u2009km) alluvial plain, linked to flaking sequences other than those of the formal artefacts. Only quartz artefacts were found in the lower levels of the site stratigraphy, whereas in the intermediate and upper levels quartz, flint and sandstone artefacts were found, suggesting that there were changes in the raw materials used for flaking over time. The formal artefacts from the site have technological attributes like the ones observed in assemblages associated with a previously known lithic industry (Rioclarense), but a different pattern of choice of raw materials. This suggests that technical standards underwent a process of adaptation to the environmental particularities surrounding the Rinc\u00e3o I site<\/em>.<\/div> <\/p>\n\n\n\n

Keywords: <\/strong>alluvial plain occupation; geoarchaeology; hillslope occupation; Late Quaternary; palaeopedology<\/p>\n<\/blockquote>\n\n\n\n

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Pedro Michelutti Cheliz; Juliana Alves Rodrigues; Francisco Sergio Bernardes Ladeira. O papel do meio f\u00edsico e relevo na ocupa\u00e7\u00e3o humana: potencialidades, vulnerabilidades e impactos ambientais (enchentes, eros\u00e3o e assoreamento) na trajet\u00f3ria hist\u00f3rica da regi\u00e3o de Araraquara (SP).<\/strong><\/span> Revista Brasileira de Geografia F\u00edsica, v. 16, n.01 2023.<\/strong><\/p>\n\n\n\n

\"\"<\/a> ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

Buscando contribuir para a discuss\u00e3o sobre o papel do meio f\u00edsico na trajet\u00f3ria de ocupa\u00e7\u00e3o humana p\u00f3s-cabralina do Oeste Paulista, realizou-se \u2013 por meio de integra\u00e7\u00e3o de revis\u00e3o bibliogr\u00e1fica, e levantamento de novas informa\u00e7\u00f5es atrav\u00e9s de mapeamentos de campo e an\u00e1lise de imagens a\u00e9reas \u2013 um estudo de detalhe na regi\u00e3o de Araraquara (SP). Apresentouse as principais caracter\u00edsticas do meio f\u00edsico (e.g \u2013 topografia, solos, drenagem, clima e unidades geol\u00f3gicas) da \u00e1rea, e discutiu-se o papel delas para a funda\u00e7\u00e3o e expans\u00e3o dos n\u00facleos de ocupa\u00e7\u00e3o regionais. Igualmente, sumarizou-se os compartimentos de relevo majorit\u00e1rios da \u00e1rea (Planaltos Residuais, Patamares Transicionais e Terras Baixas), bem como as principais potencialidades e vulnerabilidades para ocupa\u00e7\u00e3o humana de cada uma destas unidades da paisagem. Demonstrou-se que cada um destes compartimentos de paisagem foi reservado para distintos usos e fun\u00e7\u00f5es urbanas e rurais nas diferentes fases de ocupa\u00e7\u00e3o do Oeste Paulista que se deram na \u00e1rea desde o s\u00e9culo XVIII, mostrando como a incorpora\u00e7\u00e3o humana do meio f\u00edsico e relevo usou de maneiras distintas as heterog\u00eaneas potencialidades de uso de cada qual deles. Mostrou-se que cada qual destas unidades da paisagem vinculam-se a diferentes vulnerabilidades, de maneira que a intensifica\u00e7\u00e3o do uso humano dos distintos compartimentos de relevo \u2013 em especial de \u00e1reas tidas como de maior criticidade – se mostraram na forma de diferentes impactos ambientais, ressaltando-se distintas suscetibilidades e ocorr\u00eancias de enchentes, eros\u00e3o e assoreamento (incluindo taxa de sedimenta\u00e7\u00e3o 70 vezes maior do que no tempo anterior a urbaniza\u00e7\u00e3o) dos rios. Apontou-se, ainda, padr\u00f5es de ocupa\u00e7\u00e3o e legisla\u00e7\u00f5es municipais de uso dos solos com potencial para agravar conjunto diversificado de impactos ambientais por estarem em conflitos com vulnerabilidades do meio f\u00edsico, e apresenta-se propostas para amenizar tais contradi\u00e7\u00f5es.<\/div> <\/p>\n\n\n\n

Palavras-chave: <\/strong>baixo Rio Mogi-Gua\u00e7u, m\u00e9dio Rio Jacar\u00e9-Gua\u00e7u, geomorfologia urbana, uso humano do relevo, planejamento ambiental, Oeste Paulista<\/p>\n<\/blockquote>\n\n\n\n

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\"\" 2022<\/p>\n\n\n\n

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Diego Fernandes Terra Machado; Selma Sim\u00f5es de Castro; Francisco Sergio Bernardes Ladeira. A Geopedologia como abordagem metodol\u00f3gica para o levantamento de solos: uma breve discuss\u00e3o<\/strong>.<\/span> Revista Brasileira de Geomorfologia<\/strong>, v. 23 n. 4, 2022.<\/p>\n\n\n\n

\"\"<\/a> ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

A cartografia de solos est\u00e1 alicer\u00e7ada em dois paradigmas fundamentais da Pedologia, o de que o solo resulta de cinco fatores de forma\u00e7\u00e3o e o de que h\u00e1 uma estreita rela\u00e7\u00e3o entre o solo e a paisagem onde se situa. Nos dois casos o relevo \u00e9 um dos fatores essenciais para compreender a distribui\u00e7\u00e3o espacial dos solos na paisagem. Ao longo do tempo, o estudo das rela\u00e7\u00f5es entre solo e relevo receberam diversos nomes, dentre eles Geopedologia, contra\u00e7\u00e3o de Geomorfopedologia, definida como o estudo dos solos atrav\u00e9s de suas rela\u00e7\u00f5es com o relevo sob diferentes aspectos, seja conceitual, metodol\u00f3gico ou operacionale incluindo as escalas.Por vezes, o termo geopedologia \u00e9 tratado na literatura como sin\u00f4nimo de rela\u00e7\u00e3o solo-paisagem, de rela\u00e7\u00e3o solo-relevo, ou simplesmente correlacionada \u00e0 cartografia de solos, sem grandes distin\u00e7\u00f5es conceituais. Esta revis\u00e3o tratados eventos que levaram \u00e0 consolida\u00e7\u00e3o dos estudos da rela\u00e7\u00e3o solo-relevo, at\u00e9 a legitima\u00e7\u00e3o da Geopedologia como m\u00e9todo, enfatizando a contribui\u00e7\u00e3o da Geomorfologia para a cartografia pedol\u00f3gica.<\/div> <\/p>\n\n\n\n

Palavras-chave: <\/strong>Geopedologia; Pedologia; Pedogeomorfologia; Solo-Relevo<\/p>\n<\/blockquote>\n\n\n\n

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Francisco Sergio Bernardes Ladeira, Patricia Colombo Mescolotti, Fabiano do Nascimento Pupim, Laura Milani Dias Mathias de Faria, Mario Luis Assine. Paleosols record dry and humid paleoenvironments during the Upper Pleistocene in the Brazilian Pantanal<\/strong>.<\/span> CATENA<\/strong>, Volume 212, p. 106113, 2022.<\/p>\n\n\n\n

\"\"<\/a> ARTIGO<\/a><\/strong> ABSTRACT<\/strong><\/span>

Information on Quaternary landscapes and paleoenvironmental changes in the interior of Brazil are scarce. One of such areas, particularly sensitive to these variations, is the modern tropical Pantanal wetland, whose alluvial deposits record paleoenvironmental and paleoclimatic changes during the late Quaternary. Based on detailed pedological and sedimentological descriptions, stimulated optical luminescence dating and analytical data we described a well-exposed sedimentary succession that crops out in slope terraces of the Aquidauana River, located in the southern area of the Pantanal. We interpret environmental changes that have occurred since the beginning of the Upper Pleistocene, and which affected sedimentation and biogeochemical processes. Basal deposits comprise cross-stratified sands, which record active fluvial sedimentation from \u223c106 to \u223c70 ka, a period of probable increased river discharge. Fluvial channel facies are overlaid by pedogeneized floodplain deposits, in which we recognized a pedocomplex composed of a sequence of three late Pleistocene truncated paleosol profiles and a Holocene soil profile. The two lower paleosols are Vertisols with mottling, slickensides, rhizolites and septarian glaebules of carbonate. These characteristics indicate prolonged drought periods under semi-arid to arid climates ca. \u223c70 and \u223c30 ka. The upper paleosol profile is a Planosol (Ultisol) with block structure, waxiness, iron glaebules, and manganese films, pointing to prevailing humid climates during the terminal Pleistocene (since \u223c30 ka). Covering this truncated Planosol is a layer of fine to medium-grained Holocene sands, with development of a horizon A of an Arenosol (Entisol). These paleoenvironmental changes correlate with regional changes in precipitation deduced from speleothems in nearby plateaus and in southeastern Brazilian sites.<\/div> <\/p>\n\n\n\n

Keywords: <\/strong>Paleoclimate; Pedocomplex; Optically stimulated luminescence (OSL)<\/a><\/p>\n\n\n\n

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Diego Luciano Nascimento, Pedro Martinez, Alessandro Batezelli, Francisco S\u00e9rgio Bernardes Ladeira, Leticia Corr\u00eaa, From the micromorphology of paleoweathering fronts to paleoenvironmental analysis: A case study of the Cretaceous dune fields of Sanfranciscana Basin, Brazil<\/strong>.<\/span> CATENA<\/strong>, Volume 211<\/a>, April 2022, 106008.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> ABSTRACT<\/strong><\/span>

The work investigated the paleoenvironmental significance of kaolinite-rich weathering fronts developed during the Cretaceous in stabilized dune fields of Sanfranciscana Basin in Brazil. To this, was conducted a multi-scale analysis from the outcrops of paleosols to mineral grains and soil pores. The macro and micromorphology of paleoweathering fronts allow recognizing weathering features and estimating the porosity and hydraulic parameters (permeability, capillary pressure, and saturated hydraulic conductivity). Scanning electron microscope analyses were conducted to investigate surface microtextures of quartz grains for weathering process characterization based on dissolution microfeatures. Energy-dispersive X-ray spectrometry was utilized to identify chemical elements of clay minerals. The major and trace elements were analyzed using a Philips X-ray fluorescence (XRF) spectrometer (PW 2440). Our results showed that weathering fronts expand through preferential water paths (pipe and finger flow) in bedding planes in response to textural and porosity contrasts related to the bimodality (i.e., the difference of grain size distribution between overlapped sedimentary structures) of aeolian deposits. The dissolution features present in quartz grains, such as etching, pitting, total dissolution of grains, iron coatings, and booklets of well-developed kaolinite, reveal an increase in humidity and the pedogenetic kaolinization process typical of a humid tropical environment. These weathering patterns coincide with cooling events between the Albian and the Cenomanian report in the literature. Our study indicates that during the Cretaceous, the Sanfransicana Basin underwent climatic amelioration and a rise in water table level, which likely enhanced dune stabilization and the formation of an extensive geomorphic surface.<\/div> <\/p>\n\n\n\n

Keywords: <\/strong>Paleosol; Critical zone; Paleotopography; Weathering profile<\/a><\/p>\n<\/blockquote>\n\n\n\n

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Diego Sullivan Alves de Jesus, Francisco Sergio Bernardes Ladeira, Alessandro Batezelli. Development of an argillic horizon in polygenetic paleosols in the Mar\u00edlia Formation (Maastrichtian), Brazil: Precautions for paleoenvironmental interpretation<\/strong>.<\/span> CATENA<\/strong>, Volume 210, p. 105896, 2022.<\/p>\n\n\n\n

\"\"<\/a> ARTIGO<\/a><\/strong> ABSTRACT<\/strong><\/span>

A study of paleosols with argillic horizons found in the Mar\u00edlia Formation associated with Maastrichtian in the Cretaceous is presented herein. This study aims to investigate the polygenetic processes involved in argillic horizon formation under paleoclimatic conditions from arid to semiarid in the Brazilian Cretaceous and considers morphological soil attributes, such as evidence of cementation, macromorphological data (horizons, matrix color, structure, clay coatings, nodules, and bioturbations), micromorphological data (coarse\/fine patterns, b-fabric, clay coatings, infillings, and nodules), and water table oscillation. Seven representative profiles of paleosols were selected in the S\u00e3o Paulo state, Brazil, and soil samples of lithified paleosols were collected to determine their macromorphological\u2013micromorphological and chemical properties. Clay illuviation, carbonate accumulation, and gleization were dominant processes in the paleosols. Clay illuviation was identified from clay coatings along grain and ped surfaces. Carbonates occurred as nodules and rhizoliths and as coatings on peds. Red mottles, gray rhizohaloes with red oxidation rims, oxidic nodules, an iron-depleted matrix, and iron oxide depletion hypocoatings confirmed gleization. The argillic horizon polygenesis in the Mar\u00edlia Formation is usually interpreted as evidence of high-moisture events under arid\/semiarid climates or climate change toward moister conditions than arid\/semiarid. Thus, argillic horizon paleosols in the sedimentary records of the Mar\u00edlia Formation are not necessarily reliquial characteristics of wet paleoenvironments but are associated with changes in dominant granulometry, types of macroaggregates\u2013microaggregates, carbonate accumulation in horizons, and\/or water table oscillation. Thus, the presence of Bt horizons does not necessarily imply wet conditions with changes in the depositional system, as proposed by some authors.<\/div> <\/p>\n\n\n\n

Keywords: <\/strong>Soil micromorphology; Soil genesis; Polygenesis; Sedimentary rocks<\/a><\/p>\n<\/blockquote>\n\n\n\n

<\/div>\n\n\n\n
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\"\" 2021<\/p>\n\n\n\n

<\/p>\n\n\n\n

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Diego Luciano Nascimento, Anna Abrah\u00e3o, Hans Lambers, Grazielle S. Teodoro, Francisco S\u00e9rgio Bernardes Ladeira, Patricia de Britto Costa, Rafael S. Oliveira, C\u00e9sar Henrique Bezerra de Farias, BIOGEOMORPHOLOGICAL evolution of ROCKY hillslopes driven by roots in Campos RUPESTRES<\/em>, Brazil<\/strong>.<\/span> GEOMORPHOLOGY<\/strong>, 107985, 2021.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> ABSTRACT<\/strong><\/span>

The campos rupestres (rocky grassland) comprise an old-growth seasonally dry herbaceous ecosystem on mountaintops in central and eastern Brazil and in disjoint areas with sparse shrubs with high plant diversity and endemism. This ecosystem consists of sharp-edged quartzite landforms and rocky hillslopes with boulders, blocks, and sparse soil cover. The slopes in these environments have traditionally been viewed as a product of mechanical rock breakdown controlled by structural and lithological features of rocky hillslopes. In addition to the lithological effects on slope evolution, plant cover plays a pivotal role in the geomorphological process. We explored process\u2013form relationships between plant cover and quartzite rocky hillslopes of campos rupestres, considering the functioning of root traits of rock dwelling endemic species of Velloziaceae. Velloziaceae is an iconic plant family in campos rupestres, and several species colonize quartzite rock with different biogeomorphic effects at different scales. We present a conceptual model of the evolution of quartzite hillslopes based on the arenization process driven by roots expressing a specialized nutrient-acquisition strategy: vellozioid roots. Our results show that at the outcrop scale, roots respond to previous lithological characteristics such as joints and fractures that allow root establishment, followed by the release of large quantities of carboxylates that lead to rock dissolution. The microscopic pattern of bioweathering is associated with enlargement of the quartzite secondary porosity through the formation of root microcracks. Roots that are about 100\u202f\u03bcm thick form root mats that surround the grains and produce inter-mineral and intra-mineral porosity systems facilitating percolation of water and organic solutes increasing the weathering. This results in arenization of quartzite by grain-by-grain dissolution and reduces the rock strength, which leads to the formation of quartzite hillslopes, driven by a nutrient-acquisition strategy of vellozioid roots. The described biogeomorphic process determines trajectories of the development of landforms through time, slope-sediment production, slope morphology by the production of boulders and block fields, and sand patches that are reworked by surface runoff along the slope. The hillslopes and landforms that develop in campos rupestres are therefore products of self-reinforcing processes involving nutrient acquisition from bedrock by plants and denudation processes. Also, these positive feedbacks characterize the Velloziaceae species as ecosystem engineers.<\/div> <\/p>\n\n\n\n

Keywords: <\/strong>Biogeomorphology; Biodissolution; Biokarst; Bioerosion; Rocky grassland ecosystem; Velloziaceae; Vellozioid roots<\/p>\n\n\n\n

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DELGADO, L. ; BATEZELLI, A. ; LADEIRA, F.S.B. . Paleoenvironmental and paleoclimatic reconstruction of Lower to Upper cretaceous sequences of the Bauru Basin based on paleosol geochemistry and mineralogical analyses<\/span><\/strong>. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY<\/strong>, v. 568, p. 110328, 2021.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> ABSTRACT<\/strong><\/span>

The Cretaceous climate was characterized by arid and semiarid conditions in different parts of the world. Climatic changes for the Early to Late Cretaceous<\/a> had been reported by many authors in North America, East Asia, Africa, and South America due to the geological evolution of Laurasia and Gondwana<\/a>. In South America, the Bauru Basin, located in Brazil, is one of the most critical places to develop paleoclimatic reconstructions due to the presence of well-preserved Cretaceous sedimentary sequences<\/a>, as well as abundant fossil content and paleosol profiles. The transition between the Lower and Upper Cretaceous<\/a> in the Bauru Basin is represented by the Santo Anast\u00e1cio and Ara\u00e7atuba formations, which are characterized by a succession of sandstones<\/a>, claystones<\/a>, and paleosols. The paleosols are well distributed in the basin, providing valuable information about the paleoenvironmental conditions and insights about the tectonic and climatic changes in the Cretaceous Period. Since the 1960’s decade, the Cretaceous paleosols of the Bauru Basin have been used as stratigraphic and sedimentological proxies providing paleoenvironmental and paleoclimatic insights, principally for the Late Cretaceous Period. This study, based on macromorphological descriptions, clay mineralogy<\/a> (X-ray diffraction and scanning electron microscopy – SEM), and geochemical of paleosols, identified environmental and climatic patterns from the Lower and Upper Cretaceous. Results allowed to elaborate maps of paleoclimatic evolution that indicate changes occurred from Lower to Upper Cretaceous sequences of the Bauru Basin. These changes were compared and correlated with other continental basins in West Gondwana and Laurasia around the world, contributing to the understanding of the Cretaceous paleoclimatic context of South America..<\/div> <\/p>\n\n\n\n

Keywords: <\/strong>Brazil; Gondwana; Geochemistry; Paleoclimate; Paleoenvironment<\/p>\n<\/blockquote>\n\n\n\n

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PERDOMO, C.V.; NOGUEIRA, L.C.; MIGUEL, M.G.; LADEIRA, F.S.B. . Analysis of water retention in soil horizons of two open trenches on a slope of Serra do Mar, Brazil, susceptible to landslides<\/span><\/strong>. MATEC Web of Conferences 337, 03015 (2021)<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> ABSTRACT<\/strong><\/span>

This research presents and analyzes the results of Soil Water Characteristic Curves (SWCC) for the soil horizons (A, B and C) of two different trenches (TR3 and TR7) opened along a slope located in the Serra da Mar mountain range, Brazil. Microaggregations were observed in soil horizons of both trenches, which changed the textural classification of the soils. TR7 showed more macropores than TR3, especially on horizon C. Unimodal SWCC were obtained for soils of the horizon A for both trenches. Instead, bimodal SWCC were obtained for soils of the deeper horizons (B and C). All soil horizons showed the phenomenon of hysteresis, and it\u2019s more expressive in the macroporosity part. In TR7 the water retention capacity is lower in B and C, facilitating the drainage, however, horizons B and C of TR3 presented greater water retention capacity for the same matric suction value. Depending on the intensity and duration of rainfall, the horizons B and C of both trenches may suffer a decrease of shear strength, without necessarily saturating. The A horizon of TR3 can undergo an erosive process for heavy and short rains <\/div> <\/p>\n<\/blockquote>\n\n\n\n
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MESCOLOTTI, P. C. ; PUPIM, F. N. ; LADEIRA, F. S. B. ; SAWAKUCHI, A. O. ; CATHARINA, A. S. ; ASSINE, M. L. . Fluvial aggradation and incision in the Brazilian tropical semi-arid: Climate-controlled landscape evolution of the S\u00e3o Francisco River<\/span><\/strong>. QUATERNARY SCIENCE REVIEWS<\/strong>, v. 263, p. 106977, 2021.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> ABSTRACT<\/strong><\/span>

Large rivers are dynamic systems whose evolution depends on both internal and external forcing, particularly tectonics, sea level, and climate. Associating fluvial responses to a specific driver is a complex task that has been debated for a long time. Thus, rivers that flow exclusively under tectonically stable areas and without direct influence of relative sea level changes<\/a> are suitable targets to understand how large fluvial systems responded to past climate changes. The S\u00e3o Francisco River is one of the largest cratonic rivers across South America, and its late Quaternary sedimentary deposits record the fluvial landscape evolution<\/a> in a thousand-year timescale. The S\u00e3o Francisco River flows northward over different climate zones, with its upper course in a semi-humid setting, but with most of its watershed under semi-arid conditions. To understand the controls on sediment erosion, transport, and storage from uplands to lowlands, we investigated a 200-km section of the medium course of the S\u00e3o Francisco River in northeast Brazil. Several geomorphological zones were characterized, mapped, and dated by optically stimulated luminescence (OSL). Two zones are represented by degraded terraces with lakes, but no preserved alluvial features: (zone 1) high-level terrace (87.7 \u00b1 12.7 ka) and (zone 2) low-level terrace (65.5 \u00b1 5.3 to 39.3 \u00b1 4.3 ka). Three zones comprise the active confined aggradational plain, with features such as scroll bars and abandoned channels: (zone 3) older meander<\/a> belt (18.1 \u00b1 1.6 ka); (zone 4) young meander belt (15.5 \u00b1 1.5 to 9.5 \u00b1 1.0 ka), and (zone 5) modern channel belt (0.4 \u00b1 0.1 to 0.3 \u00b1 0.1 ka). Zone 6 comprises an eolian dune field<\/a> composed of parabolic dunes with two phases of active sedimentation (45.1 \u00b1 5.2 to 25.5 \u00b1 4.4 ka and 14.3 \u00b1 2.6 to 5.2 \u00b1 1.4 ka). Sediment deposition ages allowed the recognition of at least four phases of fluvial aggradation<\/a> (\u205390 ka; \u205366 to 39 ka; \u205318 to 9 ka and \u20530.3 ka to recent), three phases of incision (\u205385 to 66 ka; \u205339 to 18 ka and \u20539 to 1 ka), and two phases of dune field stabilization (\u205325 to 15 ka and \u20535 ka to recent). Development of the eolian dune fields occurred during drier conditions, when the inland activity of trade winds reworked sediments deposited on the fluvial plain. We interpret the incision events as having been set in motion by an increase of fluvial discharge in the upper catchment area<\/a>, produced by rainfall intensification due to activity of the South Atlantic Convergence Zone (SACZ). The aggradation and incision phases on the S\u00e3o Francisco River during the last 100 ka are therefore likely controlled by multi-millennial precipitation changes, possibly related to precession cycles. The events of high sedimentation rate<\/a> in the S\u00e3o Francisco river mouth are partially correlated with incision phases in its middle course. This suggests that sedimentation in plains of large plateau rivers can be decoupled from the coastal area.<\/div> <\/p>\n\n\n\n

Keywords: Late quaternary; Fluvial response; OSL dating; Fluvio-eolian interaction; Precession cycles<\/p>\n\n\n\n

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CHELIZ, P. M. ; LADEIRA, F. S. B.<\/strong> ; RODRIGUES, J. A.; GIANNINI, P. C. F. ; PUPIM, F. ; DESIREE, T.; RODRIGUES, R. A. Landscape evolution and unusual geomorphological-pedological-chronological relations in an alluvial plain associated with early Amerindian settlement in southeastern Brazil.<\/span><\/strong> QUATERNARY INTERNATIONAL<\/strong>, v. 598, p. 1040-6182, 2021.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> ABSTRACT<\/strong><\/span>

This article deals with geomorphological, sedimentary, paleopedological, chronological and archaeological records within a segment of the Jacar\u00e9-Gua\u00e7u River alluvial plain in southeast Brazil, aiming to evaluate the influence of climatic and hydrological changes on the landscape transformations. The data set, including geomorphological mapping, macroscopic and microscopic descriptions of soils over sedimentary deposits, spatial distribution of archaeological lithic artifacts and OSL dating, permitted the construction of an landscape evolutional model to the past 115,000 years. The results show multiple alternations between humid and drier climates that contribute to the formation of sandy and gravel deposits, accounting for seven paleosurfaces and five paleosols linked to different drainage conditions. The artifacts records of Amerindian settlements since the Pleistocene\u2013Holocene transition contributed to the demarcation of paleosurfaces that formed concurrently with landscape and river level changes. The density of human activities was found to vary simultaneously with environmental transformations in the area. A series of hydrological changes alternating between the formation of ephemeral torrential channels formed under the influence of drier climates and predominance of grassland vegetation and perennial meandering channels of different dimensions formed with the contribution of the increase of florestal associations and rise in water table were also documented, mixed with alternations between fluvial aggradation (<7\u202fm), incision (<8.5\u202fm), and avulsion (<600\u202fm). Such changes in the landscape contributed to the establishment of lower terraces with older (115\u2013111 ka) deposits and paleosols linked to good drainage conditions and higher terraces with newer (12.4\u20138 ka) deposits and paleosols linked to poor drainage conditions, constituting a pattern of combinations between landforms and associated materials different from that previously registered in the alluvial plains of southeast Brazil.<\/div> <\/p>\n\n\n\n

Keywords: Fluvial geomorphology; Jacar\u00e9-Gua\u00e7u river; Paleosol; Late pleistocene; Holoceneles.<\/p>\n<\/blockquote>\n\n\n\n

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\"\" 2020<\/p>\n\n\n\n

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ARAUJO, ASTOLFO G.M. ; FEATHERS, JAMES K. ; HARTMANN, GELVAM A. ; LADEIRA, FRANCISCO S. B. ; VALEZIO, \u00c9VERTON V. ; NASCIMENTO, DIEGO L. ; RICCI, OLIVIA ; OLIVEIRA MARUM, VICTOR J. ; FERREIRA DA TRINDADE, RICARDO I. . Revisiting Alice Boer: Site formation processes and dating issues of a supposedly pre-Clovis site in Southeastern Brazi<\/span><\/strong>l<\/strong><\/span>. GEOARCHAEOLOGY-AN INTERNATIONAL JOURNAL<\/strong>, v. 36, p. gea.21831, 2020.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> ABSTRACT<\/strong><\/span>

The Alice Boer site, located in Southeastern Brazil, was considered to be one of the oldest sites in the Americas, and a strong candidate for being a pre\u2010Clovis site. Ages obtained by researchers during the 1970s and 1980s put the site inside a chronological range between 2 and 14\u2009ka, eventually reaching as old as 30\u2009ka or even 130\u2009ka. Between 2010 and 2012, our research team revisited the site to improve the knowledge of Paleoindian occupation in Southeastern Brazil. Here, we present new data of stratigraphy and chronology (luminescence and radiocarbon dating), pedological and magnetic analysis performed at some of the sites. Results show that the site’s oldest occupation took place ca. 8\u2009ka, which provides new insight into human occupation in South America. In addition, we show some issues with radiocarbon contamination due to soil humin fraction mobility.<\/div>\n<\/blockquote>\n\n\n\n
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CHELIZ, Pedro Michelutti; de SOUSA, Jo\u00e3o Carlos Moreno; MINGATOS, Gabriela Sartori; OKUMURA, Mercedes; ARAUJO, Astolfo Gomes de Mello. A ocupa\u00e7\u00e3o humana antiga (11-7 mil anos atr\u00e1s) do Planalto Meridional Brasileiro: caracteriza\u00e7\u00e3o geomorfol\u00f3gica, geol\u00f3gica, paleoambiental e tecnol\u00f3gica de s\u00edtios arqueol\u00f3gicos relacionados a tr\u00eas distintas ind\u00fastrias l\u00edticas<\/span><\/strong>. Revista Brasileira de Geografia F\u00edsica<\/strong> v. 13 n.6. 2020.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

Com o objetivo de ponderar conex\u00f5es entre quadros naturais e a ocupa\u00e7\u00e3o humana pr\u00e9-colonial, caracterizou-se os artefatos e a contextualiza\u00e7\u00e3o geomorfol\u00f3gica e ambiental de quatro s\u00edtios l\u00edticos vinculados a antigos registros de grupos ca\u00e7adores-coletores do sul e sudeste do Brasil, associados a tr\u00eas distintas ind\u00fastrias l\u00edticas. Elencou-se associa\u00e7\u00e3o dos s\u00edtios com terrenos de baixos declives e altimetrias em seus respectivos contextos (terrenos mais est\u00e1veis para fixa\u00e7\u00e3o humana), adjacentes a c\u00f3rregos e pr\u00f3ximos de faixas do terreno que registram maiores inclina\u00e7\u00f5es e desn\u00edveis verticais, mais propensas a apresentarem afloramentos rochosos (fontes potenciais de mat\u00e9rias-primas para a confec\u00e7\u00e3o de ferramentas lascadas). Elencou-se fontes de mat\u00e9rias-primas nos entornos de cada s\u00edtio e as mat\u00e9rias-primas associadas aos artefatos, e ponderou-se a correla\u00e7\u00e3o entre os dois conjuntos de dados. Analisou-se a rela\u00e7\u00e3o dos padr\u00f5es tecnol\u00f3gicos de artefatos l\u00edticos com a caracteriza\u00e7\u00e3o petrogr\u00e1fica das mat\u00e9rias-primas, verificando-se quais silcretes semelhantes foram usadas para produ\u00e7\u00e3o de artefatos distintos. Ainda, verificou-se que alguns dos produtos l\u00edticos de um dos s\u00edtios analisados mostram padr\u00f5es tecnol\u00f3gicos semelhantes, mesmo quando obtidos a partir de silcretes distintos. Caracterizou-se aus\u00eancia de varia\u00e7\u00e3o significativa dos atributos tecnol\u00f3gicos dos artefatos registrados em diferentes posicionamentos verticais nos perfis das unidades de escava\u00e7\u00e3o nas quais foram registrados, mesmo quando mostram-se associados a registros paleoambientais distintos (altern\u00e2ncias entre climas mais secos que os atuais e condi\u00e7\u00f5es caracterizadas por incrementos de umidade no intervalo de 11 a 7 mil anos atr\u00e1s).<\/div>\n<\/blockquote>\n\n\n\n
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CHELIZ, Pedro Michelutti; GIANNINI, Paulo Cesar Fonserca. Transforma\u00e7\u00f5es geomorfol\u00f3gicas, pedol\u00f3gicas e ambientais nos Baixos Terra\u00e7os do rio Jacar\u00e9-Gua\u00e7u (s\u00edtio arqueol\u00f3gico Boa Esperan\u00e7a II, S\u00e3o Paulo) no Pleistoceno Tardio e Holoceno<\/span><\/strong>. Revista Brasileira de Geografia F\u00edsica<\/strong> v. 13 n. 5. 2020.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

Com o objetivo de discutir transforma\u00e7\u00f5es geomorfol\u00f3gicas, ambientais e pedol\u00f3gicas quatern\u00e1rias da paisagem, caracterizam-se os baixos terra\u00e7os e a plan\u00edcie aluvial do rio Jacar\u00e9-Gua\u00e7u na \u00e1rea entre Boa Esperan\u00e7a do Sul (SP) e Araraquara (SP). O conjunto de dados geomorfol\u00f3gicos, pedol\u00f3gicos, granulom\u00e9tricos, petrogr\u00e1ficos, micromorfol\u00f3gicos, mais data\u00e7\u00f5es absolutas (LOE e 14C), permitiram definir tr\u00eas fases de modifica\u00e7\u00f5es ambientais. A primeira (14500-10900 anos atr\u00e1s) caracteriza-se, ao menos parcialmente, por condi\u00e7\u00f5es mais secas que as atuais e deposi\u00e7\u00e3o de cascalheiras vinculadas a canais torrenciais ef\u00eameros de granulometria m\u00e9dia cinco vezes superior \u00e0 do rio atual. A segunda (de 10900 at\u00e9 ao menos 8000 anos atr\u00e1s) registra ascens\u00e3o do n\u00edvel de base local e do posicionamento altim\u00e9trico do canal do rio Jacar\u00e9-Gua\u00e7u de at\u00e9 7 m, intercalada com pelo menos um intervalo de estabiliza\u00e7\u00e3o do n\u00edvel de base e desenvolvimento de solo hidrom\u00f3rfico; \u00e9 marcada por aumento de umidade, deposi\u00e7\u00e3o de sedimentos areno-argilosos e estabelecimento de um sistema fluvial perene, com meandros abandonados cuja largura \u00e9 quatro vezes maior que a do canal atual. A terceira caracteriza-se pela redu\u00e7\u00e3o do n\u00edvel de base e do rio Jacar\u00e9-Gua\u00e7u em 7 m, estabelecimento da plan\u00edcie de inunda\u00e7\u00e3o atual, intensa migra\u00e7\u00e3o rumo norte (ao menos 600 m) do canal principal, e transi\u00e7\u00e3o para padr\u00f5es geomorfol\u00f3gicos e ambientais pr\u00f3ximos dos vigentes atualmente (forma\u00e7\u00e3o de meandros abandonados de larguras similares \u00e0s do atual canal). Artefatos de pedra lascada mostram-se correlatos \u00e0s fases I e II da forma\u00e7\u00e3o da paisagem local, indicando que antigos grupos humanos interagiram com as modifica\u00e7\u00f5es ambientais descritas. A disposi\u00e7\u00e3o das pe\u00e7as arqueol\u00f3gicas l\u00edticas contribui para a defini\u00e7\u00e3o de paleossuperf\u00edcies, formadas no \u00e2mbito das modifica\u00e7\u00f5es de n\u00edvel de base e do rio Jacar\u00e9-Gua\u00e7u.<\/div>\n<\/blockquote>\n\n\n\n
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\"\" 2019<\/p>\n\n\n\n

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BATEZELLI, ALESSANDRO ; LADEIRA, FRANCISCO SERGIO BERNARDES ; DO NASCIMENTO, DIEGO LUCIANO ; SILVA, M\u00c1RCIO LUIZ . Facies and palaeosol analysis in a progradational distributive fluvial system from the Campanian-Maastrichtian Bauru Group, Brazil<\/span>. SEDIMENTOLOGY<\/strong>, v. 66, p. 699-735, 2019.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> ABSTRACT<\/strong><\/span>

The Upper Cretaceous Bauru Group in south\u2010east Brazil consists of alluvial strata whose characteristics and distribution indicate a fluvial system developed in a semi\u2010arid to arid climate. Sections exposed within a 90 000 km2<\/sup> study area in Minas Gerais State (in south\u2010eastern Brazil) were evaluated using facies and palaeosol analysis to formulate depositional and pedogenic models that may account for geomorphic and climate features. From east to west, the study succession records a gradual decrease in grain size, an increase in the width\/thickness ratio in channels, a decrease in the lateral and vertical connectivity of channel deposits, and an increase in overbank deposits. The fluvial architecture indicates a braided channel belt, ephemeral ribbon\u2013channels, and an unconfined fluvial facies from east to west in the study area. The lateral and vertical distribution of facies, stratigraphic architecture and palaeocurrent data suggest proximal, medial and distal portions of a progradational distributive fluvial system. The sedimentary dynamics were marked by the building and abandonment of channels related to processes of aggradation, vegetation growth and palaeosol generation. Macromorphological and micromorphological analyses have identified pedological and mineralogical features that indicate an arid to semi\u2010arid climate with a provenance from the north\u2010eastern part of the basin (Alto Paranaiba Uplift). From the proximal to the distal portions of the distributive fluvial system, the palaeosol development is different. In the proximal portion, the palaeosols are absent or poorly developed, allowing a possible general comparison with the present soil order: Inceptisols and Aridisols. In the medial portion of the fluvial system, the palaeosols are well\u2010developed and characterized by Bt, Btk, C and Ck horizons (Alfisols, Aridisols, Inceptisols and Entisols). Poorly drained to well\u2010drained palaeosols from the base to the top in the distal plain (Aridisols and Inceptisols) are associated with geomorphic and hydromorphic changes in the fluvial system due to progradational evolution. The genetic relationship between the fluvial architecture and the palaeosols enhances the understanding that the sedimentation and pedogenesis that occurs in different portions of the distributive fluvial system are related to the tectonic and climatic evolution of the basin.<\/div>\n<\/blockquote>\n\n\n\n
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CHELIZ, Pedro Michelutti; de OLIVEIRA, Regina Celia. Landscape formation, environmental changes and prehistoric occupation (Jacar\u00e9-Gua\u00e7u River Lowlands, Araraquara area, Southeast Brazil, Late Pleistocene-Holocene interval): correlation between geomorphological, pedological, geochronological and archaeological data<\/span><\/strong>. Quaternary and Environmental Geosciences<\/strong>, v. 10, 2019.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

Este artigo apresenta uma caracteriza\u00e7\u00e3o geomorfol\u00f3gica, pedol\u00f3gica e geocronol\u00f3gica e contextualiza\u00e7\u00e3o de sequ\u00eancias geomorfogen\u00e9ticas, cronomorfol\u00f3gicas e ambientais da \u00e1rea de Araraquara (centro do Estado de S\u00e3o Paulo, Sudeste do Brasil) e sua rela\u00e7\u00e3o com o material l\u00edtico de s\u00edtios l\u00edticos ca\u00e7adores-coletores. Destaque especial \u00e9 dado ao estudo detalhado das terras baixas do rio Jacar\u00e9-Gua\u00e7u (entre as cidades de Araraquara e Boa Esperan\u00e7a do Sul, estado de S\u00e3o Paulo, Brasil), pr\u00f3ximo ao s\u00edtio arqueol\u00f3gico ca\u00e7ador-coletor Boa Esperan\u00e7a II, BES II , em uma \u00e1rea de clara assimetria da plan\u00edcie aluvial e encostas adjacentes. Dados derivados do levantamento morfogen\u00e9tico e din\u00e2mica ambiental s\u00e3o usados para contextualizar o material arqueol\u00f3gico do s\u00edtio BES II, que \u00e9 discutido como estando associado \u00e0 transi\u00e7\u00e3o Pleistoceno-Holoceno (uma idade de ocupa\u00e7\u00e3o incomum para o sudeste do Brasil). Propomos um modelo geomorfol\u00f3gico para as terras baixas do Rio Jacar\u00e9-Gua\u00e7u, destacando a possibilidade de que a assimetria da plan\u00edcie estaria ligada a uma maior heterogeneidade de seu contexto geomorfol\u00f3gico de semidetalhes, parcialmente correlacionado com a sobreposi\u00e7\u00e3o de influ\u00eancia neotect\u00f4nica e flutua\u00e7\u00f5es ambientais. Sugere-se que a caracteriza\u00e7\u00e3o do meio f\u00edsico das terras baixas acima mencionadas sejam compat\u00edveis com as idades absolutas obtidas por OSL (terra\u00e7o Ia, 14.500 \u00b1 3.000 anos AP, n\u00edvel basal de cascalho dos revestimentos superficiais, at\u00e9 10.900 \u00b1 1.500 e 4.090 \u00b1 340 anos AP nos solos arenosos e sedimentos acima do cascalho) e 14C (8630 anos AP, no n\u00edvel do solo arenoso-argiloso gleyed de 120 cm de profundidade do terra\u00e7o IIa) nos n\u00edveis arqueol\u00f3gicos dos terra\u00e7os baixos do rio Jacar\u00e9-Gua\u00e7u , em um contexto de transi\u00e7\u00e3o clim\u00e1tica de condi\u00e7\u00f5es mais secas que as atuais para outras de maior umidade, mudan\u00e7as hidrol\u00f3gicas (canais ef\u00eameros e torrenciais mudando para regimes oscilantes de canais perenes, com conjuntos de meandros de larguras vari\u00e1veis de paleocanais, sugerindo mudan\u00e7as clim\u00e1ticas relacionadas \u00e0s modifica\u00e7\u00f5es do padr\u00f5es fluviais), flutua\u00e7\u00f5es sucessivas (<10 m) dos n\u00edveis de base e intensa (500 m) migra\u00e7\u00e3o lateral do rio principal para o norte guiando as sucess\u00f5es cronomorfol\u00f3gicas locais entre Pleistoceno Tardio e o Holoceno. As mudan\u00e7as na paisagem e na din\u00e2mica fluvial ao longo do tempo influenciaram em mudan\u00e7as na disponibilidade de atributos necess\u00e1rios para o estilo de vida do ca\u00e7ador-coletor (como flutua\u00e7\u00f5es na deposi\u00e7\u00e3o \/ exposi\u00e7\u00e3o de seixos de rio usados como mat\u00e9ria-prima para a fabrica\u00e7\u00e3o de ferramentas). Essas oscila\u00e7\u00f5es s\u00e3o apresentadas como um contributo para explicar a altern\u00e2ncia entre n\u00edveis arqueol\u00f3gicos mais e menos densos ao longo dos cortes verticais dos baixas terra\u00e7os e a localiza\u00e7\u00e3o geomorfol\u00f3gica de exce\u00e7\u00e3o do s\u00edtio BES II (instalado em plan\u00edcie fluvial e terra\u00e7os baixos num segmento caracterizado pela raridade de afloramentos rochosos, enquanto a maioria dos s\u00edtios na \u00e1rea de Araraquara est\u00e3o ligados a encostas, afloramentos proximais a rochosos – fontes prim\u00e1rias de forma\u00e7\u00e3o de artefatos l\u00edticos).<\/div>\n<\/blockquote>\n\n\n\n
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DO NASCIMENTO, DIEGO LUCIANO ; BATEZELLI, ALESSANDRO ; LADEIRA, FRANCISCO S\u00c9RGIO BERNARDES . The paleoecological and paleoenvironmental importance of root traces: Plant distribution and topographic significance of root patterns in Upper Cretaceous paleosols<\/span>. CATENA, <\/strong>v. 172, p. 789-806, 2019.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> ABSTRACT<\/strong><\/span>

Rhizoliths are organosedimentary structures produced by plants and are an important proxy for paleoenvironmental reconstructions<\/a> because the differences in the morphology of rhizoliths and their rooting depths can be used to interpret soil humidity regimes, overall biomass at the soil surface, and the behavior of the water table. With the objective of advancing knowledge on rhizoliths, a study was performed on the macromorphological and micromorphological characterizations of the rhizoliths preserved in the thirty-one paleosols<\/a> of the Mar\u00edlia Formation in Minas Gerais, southeastern Brazil. Based on the topological and architectural attributes of rhizoliths, and on their possible functional adaptations, such as mycorrhizal associations, three different types of rhizoliths are described in this study and represent at least three different plants: rhizohaloes, root casts and rhizocretions. Well-developed paleosols with nodular horizons contain the higher density of long root casts, indicating a seasonally dry environment, because the root casts present two meters in length. These adaptations are associated with an exploitation of a lowered water table during most times of the year. The higher density of rhizoliths indicates an area with agglomerated arboreous arbustive vegetation cover. Paleosols with chalky horizons also show a high density of root casts, indicating a landscape with high plant density that is adapted to drained soils, but with a seasonally elevated water table or the influence of ephemeral flows, given the proximity to the flow channels. The poorly drained paleosols with redoximorphic features show the lowest density of rhizoliths, thus indicating an incipient vegetation in response to near-surface water table and waterlogged soils<\/a> in a distal floodplain<\/a>. The rhizogenic laminar horizons have developed near fluvial channels with frequent sedimentary input, resulting in a sequence of laminar horizons composed of rhizocretions that are separated by sandy deposits or poorly developed pedogenic horizons. The micromorphological analysis on the rhizogenic laminar calcretes<\/a> showed biogenic features, such as alveolar septal structures, calcified filaments, microcodium, calcified cells and pisoliths. Despite the scarce paleobotanical findings in the Mar\u00edlia Formation, the results obtained indicate an ecosystem that was composed of plants varying from herbaceous to arboreous, with an environment similar to modern semiarid shrublands<\/a>.<\/div>\n<\/blockquote>\n\n\n\n
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TEODORO, G. S. ; LAMBERS, H. ; NASCIMENTO, D. L. ; COSTA, P. B. ; FLORES-BORGES, D. N. A. ; ABRAHAO, A. ; MAYER, J. L. S. ; SAWAYA, A. C. H. F. ; LADEIRA, F. S. B. ; ABDALA, D. B. ; PEREZ, C. A. ; OLIVEIRA, R. S. Specialized roots of Velloziaceae weather quartzite rock while mobilizing phosphorus using carboxylates<\/span><\/strong>. FUNCTIONAL ECOLOGY<\/strong>, v. 33, p. 762-773, 2019.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

Campos rupestres is an extremely phosphorus (P)\u2010impoverished rocky ecosystem in Brazil. Velloziaceae is an important plant family in this environment, and some species colonize exposed quartzite rock. However, we know virtually nothing about their root development and nutrient acquisition within the rock outcrops
and their possible role in rock weathering and landscape formation. We tested the hypothesis that Velloziaceae dissolve P from the rock, enhancing rock weathering. The study was carried out with two Barbacenia species (Velloziaceae) that colonize quartzite rocks. We assessed the root specializations and exudates, and determined the mineralogical composition of the rocks. The quartzite rocks contained a low concentration of total P in a matrix composed predominantly of silica. Using transmission electron microscopy, we show root growth perpendicular to the rock\u2010bedding planes. A micro\u2010XRF set\u2010up at the XRF beamline of a synchrotron evidenced root\u2010associated rock dissolution. The investigated roots show novel morphological and physiological specializations, coined vellozioid roots, which are highly effective at P acquisition. These carboxylate\u2010releasing roots function like other specialized roots in nutrient\u2010depleted soils. The rocks represent a barrier for most species, but due to their chemical and physical actions inside the rocks, vellozioid roots play a pivotal role in rock weathering, contributing to shaping the campos rupestres landscapes.<\/div>\n\n\n\n

Keywords: campos rupestres, exudates, phosphorus, quartzite, vellozioid roots<\/span><\/p>\n<\/blockquote>\n\n\n\n

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SANTOS, M.<\/a> ; LADEIRA, F. S. B. ; BATEZELLI, A.<\/a> . INDICADORES GEOM\u00d3RFICOS APLICADOS \u00c0 INVESTIGA\u00c7\u00c3O DE DEFORMA\u00c7\u00c3O TECT\u00d4NICA: UMA REVIS\u00c3O.<\/span><\/strong> REVISTA BRASILEIRA DE GEOMORFOLOGIA<\/strong>, v. 20, p. 287-316, 2019.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

Este trabalho re\u00fane e discute as principais t\u00e9cnicas de estudo de indicadores geom\u00f3rficos desenvolvidas por diversos pesquisadores ao longo do tempo e, correntemente, aplicadas \u00e0 investiga\u00e7\u00e3o de deforma\u00e7\u00e3o tect\u00f4nica\/neotect\u00f4nica\/ tect\u00f4nica ativa. A drenagem \u00e9 um dos elementos mais sens\u00edveis a modifica\u00e7\u00f5es do relevo, sobretudo \u00e0quelas relacionadas a manifesta\u00e7\u00f5es tect\u00f4nicas e\/ou mudan\u00e7as clim\u00e1ticas, a oscila\u00e7\u00f5es do n\u00edvel do mar, ou ainda \u00e0 a\u00e7\u00e3o antr\u00f3pica. Esta sensibilidade dos rios frente a modifica\u00e7\u00f5es do relevo reflete, n\u00e3o somente, em sua r\u00e1pida resposta morfol\u00f3gica\/morfom\u00e9trica e sedimentar, mas tamb\u00e9m no r\u00e1pido
ajuste a um est\u00e1gio de quase-equil\u00edbrio em curtos per\u00edodos de tempo geol\u00f3gico. Isto permite inferir atividade tect\u00f4nica recente, mediante identifica\u00e7\u00e3o de regi\u00f5es em desequil\u00edbrio erosional em \u00e1reas de grande extens\u00e3o, independentemente de prov\u00edncias geol\u00f3gicas ou geom\u00f3rficas. Tal caracter\u00edstica singular dos rios refor\u00e7a a import\u00e2ncia de identifi ca\u00e7\u00e3o de comportamentos an\u00f4malos destes em investiga\u00e7\u00f5es de atividade tect\u00f4nica e da evolu\u00e7\u00e3o de ambientes modernos ou reconstitui\u00e7\u00e3o paleogeogr\u00e1fica. Desta forma, a revis\u00e3o apresentada considera os \u00edndices relacionados a caracter\u00edsticas quantific\u00e1veis do relevo, tais como altimetria, hipsometria e declividade, e, sobretudo, a indicadores relacionados a respostas geom\u00f3rficas e de sedimenta\u00e7\u00e3o de rios frente a deforma\u00e7\u00e3o tect\u00f4nica (desvios, capturas e decapita\u00e7\u00e3o; sinuosidade; mudan\u00e7a de padr\u00e3o de drenagem; migra\u00e7\u00e3o e avuls\u00e3o; deforma\u00e7\u00e3o de perfis longitudinais e \u00edndice SL; assimetria e forma da bacia hidrogr\u00e1fica; sinuosidade de rios e padr\u00e3o de canal, Sinuosidade de front de montanha (Smf); \u00cdndice de atividade tect\u00f4nica relativa (Iat) e carga sedimentar e fluxo, entre outros). Para tal objetivo, o presente estudo envolveu revis\u00e3o bibliogr\u00e1fica e leitura dos autores proponentes de tais t\u00e9cnicas, enriquecida pela exemplifica\u00e7\u00e3o de alguns estudos de caso, como no rio Aiuruoca (Serra da Mantiqueira, MG) e rios das Cinzas e Laranjinha (bacia do rio das Cinzas, norte do estado do Paran\u00e1). Distante de uma pretens\u00e3o de totalizar ou encerrar o assunto, este trabalho prop\u00f5e auxiliar na estrat\u00e9gia de investiga\u00e7\u00e3o e no processo de escolha das diversas t\u00e9cnicas existentes, bem como contribuir para um melhor entendimento e aplica\u00e7\u00e3o destas.<\/div>\n\n\n\n

Palavras-chave: Indicadores geom\u00f3rficos; Tect\u00f4nica; Rios<\/p>\n<\/blockquote>\n\n\n\n

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DELGADO, L. ; BATEZELLI, A.<\/a> ; LADEIRA, F.S.B. ; LUNA, J. Paleoenvironmental and paleoclimatic interpretation of the Late Cretaceous Mar\u00edlia Formation (Brazil) based on paleosol geochemistry<\/span><\/strong>. CATENA<\/strong>, v. 180, p. 365-382, 2019.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> ABSTRACT<\/strong><\/span>

The Late Cretaceous Mar\u00edlia Formation located in the central-southern portion of Brazil is characterized by a succession of sandstones, conglomerates, and paleosols. The paleosols constitute more than 60% of this formation, providing significant information about pedogenetic processes as well as paleoenvironmental and paleoclimate implications. The paleosols of the Mar\u00edlia Formation have been studied principally from a stratigraphical, sedimentological and paleopedological point of view; however, there are no studies addressing in detail the geochemical behavior of the paleosols. Therefore, we used a robust geochemical dataset combined with stratigraphical and macromorphological interpretations as well as clay mineralogy to conduct a paleoenvironmental and paleoclimate analysis of the Mar\u00edlia Formation in the western portion of the state of Minas Gerais in Brazil. The results indicate that the paleosols of the Mar\u00edlia Formation can be divided into three pedotypes and pedochemical units based on their geochemical variations and are limited at the base and top by pedochemical markers. Moreover, X-ray diffraction identified quartz and calcite as primary minerals associated
with montmorillonite, smectite, illite and palygorskite, indicating wet periods combined with dry stages associated principally with dry and arid environments. The paleosol distribution and weathering index allow us to interpret the paleoenvironmental evolution of the Late Cretaceous Mar\u00edlia Formation, suggesting an increase in humidity from east to west in the study area.<\/div>\n\n\n\n

Keywords: Late Cretaceous; Mar\u00edlia Formation; Paleoenvironmental; Paleoclimate; Paleosols; Geochemistry<\/p>\n<\/blockquote>\n\n\n\n

<\/div>\n\n\n\n
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DA SILVA, M\u00c1RCIO LUIZ ; BATEZELLI, ALESSANDRO<\/a> ; LADEIRA, FRANCISCO SERGIO BERNARDES . Genesis and evolution of paleosols of the Mar\u00edlia Formation, Maastrichtian of the Bauru Basin, Brazil.<\/span><\/strong> CATENA<\/strong>, v. 182, p. 104108, 2019.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> ABSTRACT<\/strong><\/span>

Paleosols are soils that were formed on an ancient landscape. They may be buried soils and\/or soils incorporated into the sedimentary sequences, exhumed soils, or soils developed on ancient relief surfaces (relict soils). Exposed on the surface and influenced by later environmental changes, paleosols reveal ancient environments and contain records regarding the climate, vegetation, landforms, organisms, parent material, time, intensity of
pedogenesis, and sedimentation rates in effect during their training. In the Mar\u00edlia Formation, the paleosols, exhumed and buried, developed on sandstones have argic (Btk, Bt and Bss), hydromorphic (Cg) and calcic (Bk) horizons with different degrees of cementation, forming mainly calcretes. The objective of this study was to characterize the genesis of the paleosols of the Mar\u00edlia Formation, addressing the dynamics of their formation factors and processes at local and regional levels in order to reconstitute the conditions of environmental evolution of the Maastrichtian of the Bauru Basin. Eleven sections (S1, S2, S3, S4, S5, S6, S7, S8, S9, S10 and S11) of the Mar\u00edlia Formation were described and collected on nine sample profiles. Micromorphological, mineralogical and geochemical analyses were performed according to the specialized literature. In the Mar\u00edlia Formation, sedimentation, erosion and pedogenesis are processes that occurred together, concomitantly or subsequently, in view of the fluvial paleoenvironmental dynamics. The paleosols indicate the end of depositional cycles, with differentiated rates, intensities and duration. The paleosols of the Mar\u00edlia Formation comprise well-drained (Bthorizon) and poorly drained or hydromorphic (Cg-horizon) pedotypes, of drier conditions (Bkm-horizon) and pedotypes indicative of drier periods alternated with periods of higher humidity (Bss-horizon). The profiles were classified as Luvisols (Bt and Btk horizons), Calcisols (Bk and Ck horizons), Arenosols (C-horizons) and Vertisols (Bss-horizons). Paleosols developed on the flatter and lower portions of the slopes and floodplains and were commonly influenced by the oscillation of the groundwater and the seasonality of the climate. Sandstone with allochthonous and autochthonous carbonate cementation constituted the main parent material of the paleosols. The predominant climate during the Maastrichtian was semi-arid, with seasonality and variations in precipitation patterns and a precipitation-evapotranspiration relationship that provided conditions for the formation of paleosols with Bk, Btk, Bss, Bg and Bt horizons. The time of formation of these diagnostic horizons was dependent on climatic and edaphic factors. However, the time factor lasted until approximately 200,000 years, allowing paleosols to develop with Bt-horizons and prismatic and block structures. Calcification and argilluviation were the formation processes responsible for the genesis and evolution of paleosols during the Maastrichtian of the Bauru Basin. Weathering indexes have shown that paleosols with Bt-horizons are more weathered than are those with Btk and Bk horizons. The paleosols with Bk-horizons reflect periods with more arid conditions in the general context of the semi-arid paleoclimate of the Maastrichtian of the Bauru Basin.<\/div>\n\n\n\n

Keywords: Calcrete; Formation factors; Formation processes; Upper Cretaceous; Weathering<\/p>\n<\/blockquote>\n\n\n\n

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PUTRINO, SARA MARQUES; LADEIRA, FRANCISCO SERGIO BERNARDES. Tecnossolos \u00darbicos do Parque Linear Ribeir\u00e3o das Pedras, Campinas\/SP<\/span><\/strong>. Revista do Instituto Geol\u00f3gico<\/strong>, v. 40, p. 19-52, 2019.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

O ponto fundamental que permite reconhecer os humanos como agentes geol\u00f3gicos \u00e9 a possibilidade de compara\u00e7\u00e3o dos efeitos de suas a\u00e7\u00f5es aos efeitos resultantes de causas naturais, como a tect\u00f4nica, mudan\u00e7as clim\u00e1ticas, terremotos, tsunamis, etc.
As profundas e, muitas vezes, abruptas interven\u00e7\u00f5es humanas no meio ambiente, t\u00eam gerado, em escala crescente ao longo dos anos, sedimentos e volumes pedol\u00f3gicos com caracter\u00edsticas muito diferentes dos naturais. Especificamente, os Tecnossolos \u00darbicos (IUSS 2014) s\u00e3o solos profundamente modificados pela a\u00e7\u00e3o humana, que apresentam grande variabilidade vertical e horizontal e muitos artefatos manufaturados ao longo do perfil. A \u00e1rea em estudo localiza-se na regi\u00e3o noroeste do munic\u00edpio de Campinas\/SP, abrangendo parte da plan\u00edcie aluvial do ribeir\u00e3o das Pedras, mais especificamente o trecho entre sua nascente e a Rodovia Dom Pedro I (SP-65). O objetivo deste trabalho foi caracterizar os Tecnossolos dessa \u00e1rea e compreender a hist\u00f3ria de sua forma\u00e7\u00e3o. A metodologia adotada compreendeu a: investiga\u00e7\u00e3o do hist\u00f3rico de uso e ocupa\u00e7\u00e3o
local, observa\u00e7\u00e3o da paisagem (vegeta\u00e7\u00e3o, ocupa\u00e7\u00e3o), coleta de amostras de solo para a realiza\u00e7\u00e3o de an\u00e1lises f\u00edsicas e qu\u00edmicas e interpreta\u00e7\u00e3o dos resultados buscando rela\u00e7\u00f5es entre os n\u00edveis de fertilidade, elementos contaminantes e os artefatos encontrados nos perfis. Os resultados mostraram que de maneira geral, os solos da \u00e1rea de estudo s\u00e3o arenosos, apresentam altos n\u00edveis de fertilidade e concentra\u00e7\u00f5es de elementos como B\u00e1rio (Ba), Cromo (Cr), Cobre (Cu), Chumbo (Pb), N\u00edquel (Ni), Van\u00e1dio (V) e Zinco (Zn) acima dos limites de preven\u00e7\u00e3o estabelecidos pela CETESB.<\/div>\n\n\n\n

Palavras-chave: Tecnossolos \u00darbicos; Dep\u00f3sitos tecnog\u00eanicos; Solos trbanos; Artefatos
antr\u00f3picos.<\/p>\n<\/blockquote>\n\n\n\n

<\/div>\n\n\n\n
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MESCOLOTTI, P. C. ; VAREJAO, F. G. ; WARREN, L. V. ; LADEIRA, F. S. B. ; GIANNINI, P. C. F. ; ASSINE, M. L. . The sedimentary record of wet and dry eolian systems in the Cretaceous of Southeast Brazil: stratigraphic and paleogeographic significance<\/span><\/strong>. Brazilian Journal of Geology<\/strong>, v. 49, p. 1-20, 2019.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> ABSTRACT<\/strong><\/span>

Sedimentologic and stratigraphic studies of paleo-deserts from the Brazilian Cretaceous are of great potential to understand the paleoclimate and paleogeography of Gondwana during its final rifting stage. Herein, we describe and discuss two depositional units characterized by two distinct eolian systems that are bounded by a long-lived unconformity. The Lower Unit (Barremian\/Aptian) encompasses a wet eolian system composed of dune, interdunes, and ephemeral alluvial deposits. A continuous paleosol horizon in the upper part of the Lower Unit records dune stabilization and end of eolian accumulation, in a period of climate amelioration possibly in the late Aptian. The stratigraphic gap proposed for the unconformity (Cenomanian to Coniacian) coincides with the Cretaceous Thermal Maximum. The Upper Unit (Santonian?\/Campanian) comprises dune fields of a dry eolian system capped by the Mata da Corda volcanic rocks. Cross stratification dip directions from both eolian systems shows transport towards SSW. Paleo-winds coming from the northeast quadrant reveal that the continental breakup and drifting had little influence on the surface winds in this Gondwana sector. The Upper Cretaceous paleo-winds are coherent with global paleo-circulation models, based on a high- pressure cell over the South Atlantic proto-ocean, favoring desertification in the inner portion of
the southwestern Gondwana.<\/div>\n\n\n\n

Keywords: Areado Group; Eolian systems; Cretaceous paleo-winds; Sanfranciscana Basin.<\/p>\n<\/blockquote>\n\n\n\n

<\/div>\n\n\n\n
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\"\" 2018<\/p>\n\n\n\n

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DA SILVA, M\u00c1RCIO LUIZ ; BATEZELLI, ALESSANDRO<\/a> ; LADEIRA, FRANCISCO SERGIO BERNARDES . Genesis and paleoclimatic significance of palygorskite in the cretaceous paleosols of the Bauru Basin, Brazil. <\/span>CATENA<\/strong>, v. 168, p. 110-128, 2018.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> ABSTRACT<\/strong><\/span>

In pedogenic and depositional systems, the identification of palygorskite has been frequently associated with arid and semi-arid climates, where potential evapotranspiration greatly exceeds precipitation. This condition is indicative of low rainfall and alkaline pH conditions. In a pedogenic environment, palygorskite is formed by the weathering of primary minerals, such as pyroxene and biotite; the transformation of smectites and illites; or by precipitation in solutions rich in magnesium and silicon under alkaline conditions. Vadose zones
are also favorable for the in situ formation of palygorskite associated with calcretes. The micromorphology, quantitative analysis and geochemistry of palygorskite in paleosols allowed the identification of vertical variations in the paleosol profiles of the Mar\u00edlia Formation, recognizing horizons with increased mineral concentrations or leaching and indirectly revealing environmental changes during its pedogenetic evolution. The objective of this study was to discuss the importance of palygorskite in the evolution of the paleosols of the Mar\u00edlia Formation and to correlate the genesis of this mineral with the climatic conditions of the Maastrichtian of the Bauru Basin in southeast Brazil. Three paleosol section have been described (A1, A2, A3) in the Mar\u00edlia Formation. Their mineralogy was determined by X-ray diffractometry, and mineral quantification was based on the Rietveld refinement method. The geochemical data were obtained by X-ray fluorescence spectrometry. The analysis and interpretation of thin sections and scanning electron microscopy (SEM) were performed on several samples. The results showed that the main paleoclimatic condition for the genesis of palygorskite in the paleosols of the Mar\u00edlia Formation involved a semi-arid climate, especially during the deposition and evolution of this unit in the Maastrichtian of the Bauru Basin. However, the variation in the calcite content and the diversity of subsurface horizons (Bkm, Btkm, Bt) suggests a less arid climate with different weathering stages. The variations in the oxide content, mineral changes, and textures in the paleosol profiles suggest weathering processes, supporting the thesis of the pedogenic origin of calcretes. The formation of palygorskite occurred in three polygenetic types (P, P1 and P2). The palygorskite type P in the A1 section mainly resulted from a neoformation process dependent on the variation of calcite and the availability of magnesium and silica under alkaline pH conditions. In the A2 section, the polygenesis of palygorskite (P, P1 and P2) is evidenced by the transformation of the primary biotite and secondary smectites in the argillic horizons (Bt and Btkm). The polygenetic conditions (P and P1) of palygorskite in the A3 section were dependent on the weathering of the biotite and calcite content in the calcic horizons.<\/div>\n\n\n\n

Keywords: Calcrete, Geochemistry, Mar\u00edlia Formation, Micromorphology, Rietveld Refinement<\/p>\n<\/blockquote>\n\n\n\n

<\/div>\n\n\n\n
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\"\" 2017<\/p>\n\n\n\n

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NASCIMENTO, D. L. ; LADEIRA, F. S. B. ; BATEZELLI, A.<\/a> . Pedodiagenetic Characterization of Cretaceous Paleosols in Southwest Minas Gerais, Brazil.<\/span><\/strong> Revista Brasileira de Ci\u00eancia do Solo<\/strong>, v. 41, p. 1-18, 2017.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> ABSTRACT<\/strong><\/span>

The influence of post-burial geological processes on preserving pedogenic properties has great importance in identifying ancient paleosols both in the field and in a laboratory. However there are not many publications that focus on characterizing paleosol diagenesis. As temperature and pressure progressively increase, evidence of pedogenesis is modified and destroyed, hindering paleoenvironment characterization and interpretation. This paper discusses diagenetic evidence and its relation to strictly pedogenic features, like structure, cements, nodules, and neoformation of clay minerals using the carbonate paleosols of the Mar\u00edlia Formation in the upper unit of the Bauru Basin as a case study. Despite the long geotectonic and thermal history of the Mar\u00edlia Fomation, paleosols bring us pedogenic evidence that can undergo micromorphological analyses, such as cementation, clay illuviation, bioturbation, and ped structures. The results of analyses in 25 paleopedogenic horizons indicate that the paleotopographic features were responsible for distribution of the diagenetic processes and preservation of the paleosol properties. The maturity of those paleosols controls lithification. In mature paleosols that developed in more stable portions of the landscape, characteristics such as carbonate cementation and development of pedogenic structures are the main factors that inhibit diagenesis. However diagenetic processes that influence poorly-developed paleosols are controlled by depositional characteristics and by changes in the water table, enabling more advanced diagenetic processes, compared to mature paleosols.<\/div>\n\n\n\n

Keywords: Mar\u00edlia Formation; pedogenesis; diagenesis.<\/p>\n<\/blockquote>\n\n\n\n

<\/div>\n\n\n\n
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SILVA, M. L. ; BATEZELLI, A.<\/a> ; LADEIRA, F. S. B. Micromorphology of Paleosols of the Mar\u00edlia Formation and their Significance in the Paleoenvironmental Evolution of the Bauru Basin, Upper Cretaceous, Southeastern Brazil.<\/span><\/strong> Revista Brasileira de Ci\u00eancia do Solo<\/strong>, v. 41, p. 1-20, 2017.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> ABSTRACT<\/strong><\/span>

Deduction of associated paleoenvironments and paleoclimate, definition of the chronosequence of paleosols, and paleogeographic reconstruction have become possible through the application of micromorphology in paleopedology. Micromorphology has also been useful in recognition of weathering processes and definition of minerals formed in succession. In this respect, the objective of this study was to identify the development of pedogenic processes and discuss their significance in the paleoclimate evolution of the Mar\u00edlia Formation (Maastrichtian) of Bauru Basin. Three sections of the Mar\u00edlia Formation (A1, A2, and A3) were described, comprising nine profiles. Micromorphologic al analysis was carried out according to the specialized literature. In the Mar\u00edlia Formation, the paleosols developed in sandstones have argillic (Btkm, Bt) and carbonate (Bk) horizons with different degrees of cementation, forming mainly calcretes. The evolution of pedogenic processes, in light of micromorphological analysis, evidenced three moments or stages for the genesis of paleosols with Bkm, Btk, and Bt horizons, respectively. In the Maastrichtian in the Bauru Basin, the paleosols with Bkm are older and more arid environments, and those with Bt were formed in wetter weather, but not enough to lead to the genesis of enaulic-related distributions, typical of current Oxisols<\/div>\n\n\n\n

Keywords: Calcrete, c\/f-related distribution, b-fabric, pedofeatures, paleoclimate.<\/p>\n<\/blockquote>\n\n\n\n

<\/div>\n\n\n\n
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CELARINO, Andr\u00e9 Luiz de Souza; LADEIRA, Francisco Sergio Bernardes. How fast are soil-forming processes in Quaternary sediments of a tropical floodplain? A case study in southeast Brazil<\/span><\/strong>. Catena<\/strong>, v. 156, p. 263-280, set. 2017. Elsevier BV<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

As plan\u00edcies de inunda\u00e7\u00e3o s\u00e3o ambientes deposicionais associadas a um regime clim\u00e1tico e hidrol\u00f3gico espec\u00edfico de uma bacia de drenagem. Em condi\u00e7\u00f5es tropicais, os sedimentos podem ser rapidamente desgastados por processos de forma\u00e7\u00e3o de solo e tendem a obliterar estruturas sedimentares pr\u00e9-existentes. Portanto, o objetivo de muitos estudos em v\u00e1rzeas \u00e9 identificar e discutir tais fei\u00e7\u00f5es sedimentares, principalmente aquelas relacionadas \u00e0 morfologia dos dep\u00f3sitos do canal. Al\u00e9m disso, uma abordagem qualitativa para identificar aspectos da evolu\u00e7\u00e3o pedol\u00f3gica nesses ambientes tem sido tentada em poucos estudos. O objetivo deste estudo foi interpretar a intensidade e o tempo de intemperismo dos sedimentos aluviais por processos pedogen\u00e9ticos em condi\u00e7\u00f5es tropicais \u00famidas. Os perfis de solo foram analisados \u200b\u200bem diferentes ambientes de deposi\u00e7\u00e3o na plan\u00edcie de inunda\u00e7\u00e3o do Rio Pardo (sudeste do Brasil), considerando f\u00e1cies sedimentares e caracter\u00edsticas pedol\u00f3gicas apoiadas por dados multi proxy fornecidos por geoqu\u00edmica, macro e micromorfologia, tamanho de gr\u00e3o, carbono total, nitrog\u00eanio total, 13C an\u00e1lise isot\u00f3pica e data\u00e7\u00e3o 14C \/ OSL (luminesc\u00eancia opticamente estimulada). Com base nos resultados, identificamos que as caracter\u00edsticas pedogen\u00e9ticas e as distribui\u00e7\u00f5es do horizonte do solo estavam intimamente relacionadas \u00e0 arquitetura do sedimento, tamanho do gr\u00e3o e posi\u00e7\u00e3o na plan\u00edcie de inunda\u00e7\u00e3o. Na plan\u00edcie de inunda\u00e7\u00e3o do Pardo, gleissolos fl\u00favicos (lo\u00e2micos e argilosos) com estruturas moderadamente a fortemente desenvolvidas foram identificados em sedimentos finos sobre a margem. Cambissolos fl\u00favicos (argilosos) foram encontrados em paleomeandros abandonados, Cambissolos fl\u00favicos (lo\u00e2micos) em barras de rolagem arenosas, acrissolos (argilosos, cut\u00e2nicos, diferentes) em dep\u00f3sitos de canais, que apresentavam um horizonte Bt de 130 cm de espessura com revestimentos de argila iluvial e Histossolos (Fl\u00favico) com altos teores de carbono total (11,9% e 26,8% em horizontes histicos) em sistemas avulsivos de pequena escala. Os dep\u00f3sitos foram datados entre 35.000 e 700 anos BP. Os dados isot\u00f3picos 13C revelaram uma tend\u00eancia para valores enriquecidos em amostras mais antigas (-14,21 \u2030) em que as plantas C4 dominaram e um empobrecimento relativo dos valores em amostras mais recentes (-26,9 \u2030 a -27,9 \u2030). Esse resultado foi consistente com a tend\u00eancia de aumento da distribui\u00e7\u00e3o das plantas C3 em rela\u00e7\u00e3o \u00e0s plantas C4, favorecida pelo clima mais quente e \u00famido desde o Holoceno Superior. Neste estudo, um perfil de Gleissolo Fl\u00favico de <1000 anos e um Cambissolo Fl\u00favico de <700 anos foram identificados. No entanto, nossa principal contribui\u00e7\u00e3o \u00e9 destacar que a evolu\u00e7\u00e3o do solo nesta situa\u00e7\u00e3o espec\u00edfica pode ser mais eficiente do que o esperado. Al\u00e9m disso, para fornecer an\u00e1lises consistentes em estudos futuros, ferramentas da sedimentologia e da pedologia s\u00e3o essenciais.<\/div>\n<\/blockquote>\n\n\n\n
<\/div>\n\n\n\n
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LADEIRA, Francisco Sergio Bernardes; CELARINO, Andr\u00e9 Luiz de Souza. Propriedades Micromorfol\u00f3gicas de Um Perfil de Solo na Plan\u00edcie Fluvial do Rio Pardo (SP): cronologia e processos de altera\u00e7\u00e3o de sedimentos aluviais<\/span>.<\/strong> Revista do Departamento de Geografia<\/strong>, Volume Especial \u2013Eixo 11 (2017) 249-258<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

Em ambientes tropicais \u00famidos as taxas de pedog\u00eanese superam as de eros\u00e3o\/sedimenta\u00e7\u00e3o e podem rapidamente favorecer a altera\u00e7\u00e3o de sedimentos nas plan\u00edcies fluviais, mesmo em situa\u00e7\u00f5es de drenagem imperfeita. O objetivo principal deste trabalho foi interpretar os processos pedogen\u00e9ticos na plan\u00edcie fluvial do setor m\u00e9dio da bacia do rio Pardo, propondo para isso uma an\u00e1lise dos processos de forma\u00e7\u00e3o de solo atuantes sobre os sedimentos aluviais e do tempo de evolu\u00e7\u00e3o sob a \u00f3tica da micromorfologia. Para isso um perfil de solo foi descritoem campo, amostras foram coletadas para an\u00e1lise granulom\u00e9trica pelo m\u00e9todo da pipeta, confec\u00e7\u00e3o de l\u00e2minas e para a data\u00e7\u00e3o por LOE (Luminesc\u00eancia Opticamente Estimulada). Os resultados mostraram que um Gleissolo evoluiu em menos de 1000 anos sobre os sedimentos aluviais, apresentando horizontes B com estrutura prism\u00e1tica, al\u00e9m disso, processos de pedaliza\u00e7\u00e3o, gleiza\u00e7\u00e3o e uma incipiente plintiza\u00e7\u00e3o puderam ser identificados atrav\u00e9s da an\u00e1lise micromorfol\u00f3gica.<\/div>\n<\/blockquote>\n\n\n\n
<\/div>\n\n\n\n
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NASCIMENTO, D. L. do ; BATEZELLI, A.<\/a> ; LADEIRA, F. S. B. First record of lobed trace fossils in Brazil’s Upper Cretaceous paleosols: Rhizoliths or evidence of insects and their social behavior?<\/span><\/strong>. JOURNAL OF SOUTH AMERICAN EARTH SCIENCES<\/strong>, v. 79, p. 364-376, 2017.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> ABSTRACT<\/strong><\/span>

This is the first report of trace fossils potentially associated with insect social behavior in sandy and welldrained paleosols of the Upper Cretaceous continental sequence of Brazil. The trace fossils consist of dozens of lobed and vertical structures cemented by CaCO3 and preserved mainly in full relief in paleosols of the Marilia Formation (Bauru Basin) in the state of Minas Gerais. The described ichnofossils are predominantly vertical, up to 2 m long, and are composed of horizontal lobed structures connected by vertical tunnel-like structures that intersect in the center and at the edges. The lobed structures range from 3 to 15 cm long and 2e6 cm thick. Two different hypotheses are analyzed to explain the origin of the trace fossils; the less probable one is that the structures are laminar calcretes associated with rhizoliths and rhizoconcretions. The hypothesis involving social insects was considered because the trace fossils described herein partially resemble a modern ant nest and the ichnofossil Daimoniobarax. The micromorphological analysis of the lobed and tunnel-like structures indicates modifications of the walls, such as the presence of inorganic fluidized linings, dark linings and oriented grains, supporting the hypothesis that they are chambers and shafts. The architecture and size of the reported nests suggest the possibility that social insect colonies existed during the Maastrichtian and are direct evidence of the social behavior and reproductive strategies of the Cretaceous pedofauna.<\/div>\n\n\n\n

Keywords: Continental ichnology; Social insects; Mar\u00edlia Formation; Maastrichtian; Rhizoliths<\/p>\n<\/blockquote>\n\n\n\n

<\/div>\n\n\n\n
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SILVA, M\u00c1RCIO LUIZ DA ; BATEZELLI, ALESSANDRO<\/a> ; LADEIRA, FRANCISCO S\u00c9RGIO BERNARDES . The mineralogy of paleosols in the Mar\u00edlia Formation and their importance in the environmental evolution of the Maastrichtian of the Bauru Basin in southeastern Brazil. <\/span>Brazilian Journal of Geology<\/strong>, v. 47, p. 403-426, 2017.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

Solos e paleossolos refletem complexa inter-rela\u00e7\u00e3o entre sedimenta\u00e7\u00e3o, eros\u00e3o e n\u00e3o-deposi\u00e7\u00e3o. A an\u00e1lise dos constituintes mineral\u00f3gicos de paleossolos \u00e9 fundamental para a reconstitui\u00e7\u00e3o dos fatores, processos e ambientes no qual esses se formaram. O reconhecimento de determinadas assembl\u00e9ias mineral\u00f3gicas podem revelar as condi\u00e7\u00f5es ambientais durante a pedog\u00eanese e atrav\u00e9s da an\u00e1lise quantitativa se torna poss\u00edvel constatar varia\u00e7\u00e3o vertical ao longo dos perfis de paleossolos, identificando horizontes com maior concentra\u00e7\u00e3o mineral ou lixivia\u00e7\u00e3o, apontando indiretamente processos ambientais que dominavam no decorrer da evolu\u00e7\u00e3o pedogen\u00e9tica. O objetivo desse trabalho foi discutir o significado das fases minerais e sua quantifica\u00e7\u00e3o na evolu\u00e7\u00e3o ambiental e no grau de desenvolvimento dos paleossolos da Forma\u00e7\u00e3o Mar\u00edlia, Maastrichtiano da Bacia Bauru. Foram descritas tr\u00eas se\u00e7\u00f5es (A1, A2, A3) da Forma\u00e7\u00e3o Mar\u00edlia. A mineralogia foi determinada atrav\u00e9s da difratometria de raios-x e para a quantifica\u00e7\u00e3o mineral foi utilizado o m\u00e9todo de refinamento Rietveld. Os calcretes da Forma\u00e7\u00e3o Mar\u00edlia s\u00e3o predominantemente pedog\u00eanico, com minerais autig\u00eanicos em sua maioria. A varia\u00e7\u00e3o do teor de quartzo, calcita, paligorskita e esmectita, a micromorfologia e a diversidade de horizontes subsuperficiais (Bkm, Btkm, Bt) demonstraram que os paleossolos se desenvolveram em condi\u00e7\u00f5es gerais semi\u00e1ridas, com epis\u00f3dios de maiores taxas de precipita\u00e7\u00e3o, umidade, lixivia\u00e7\u00e3o e dessilica\u00e7\u00e3o.<\/div>\n\n\n\n

Palavras-chave: Calcrete; Paleoclima; Paligorskita; Pedog\u00eanese; Cret\u00e1ceo Superior.<\/p>\n<\/blockquote>\n\n\n\n

<\/div>\n\n\n\n
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NASCIMENTO, DIEGO LUCIANO DO ; BATEZELLI, ALESSANDRO<\/a> ; LADEIRA, FRANCISCO S\u00c9RGIO BERNARDES . Freshwater Decapoda trace fossils in floodplain paleosols of Marilia Formation in Minas Gerais State (SE Brazil)<\/strong>.<\/span> REVISTA BRASILEIRA DE PALEONTOLOGIA<\/strong>, v. 20, p. 287-298, 2017.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> ABSTRACT<\/strong><\/span>

The Marilia Formation (Bauru Group, Bauru Basin) is an important record of the Upper Cretaceous in Brazil, and hosts an important fossil content. However, works regarding continental ichnology in this unit are still scarce. In order to improve this knowledge, the present work describes the occurrence of Camborygma litonomos in paleosols developed from floodplain deposits of the Marilia Formation in the Minas Gerais State. This trace fossil is associated with the activity of freshwater crayfishes, digging the soil looking for protection and to avoid the carapace dryness. Crayfish body fossils have not yet been described in deposits of the Bauru Group, thus, the trace fossil here recorded is the exclusive evidence of this organism, which is of great importance to the knowledge of the invertebrates paleodiversity of the Marilia Formation during the Late Cretaceous. <\/div>\n\n\n\n

Keywords: ichnology, Camborygma litonomos, crustaceans, Upper Cretaceous, Bauru Group, paleopedology.<\/p>\n<\/blockquote>\n\n\n\n

<\/div>\n\n\n\n
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\"\" 2016<\/p>\n\n\n\n

\n

BATEZELLI, ALESSANDRO<\/a> ; LADEIRA, FRANCISCO SERGIO BERNARDES. Stratigraphic framework and evolution of the Cretaceous continental sequences of the Bauru, Sanfranciscana, and Parecis basins, Brazil<\/span><\/strong>. Journal of South American Earth Sciences<\/strong>, v. 65, p. 1-24, 2016.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> ABSTRACT<\/strong><\/span>

With the breakup of the supercontinent Gondwana, the South American Plate has undergone an intense process of tectonic restructuring that led to the genesis of the interior basins that encompassed continental sedimentary sequences. The Brazilian Bauru, Sanfranciscana and Parecis basins during Late Cretaceous have had their evolution linked to this process of structuring and therefore have very similar sedimentary characteristics. The purpose of this study is to establish a detailed understanding of alluvial sedimentary processes and architecture within a stratigraphic sequence framework using the concept of the stratigraphic base level or the ratio between the accommodation space and sediment supply. The integration of the stratigraphic and facies data contributed to defining the stratigraphic architecture of the Bauru, Sanfranciscana and Parecis Basins, supporting a model for continental sequences that depicts qualitative changes in the sedimentation rate (S) and accommodation space (A) that occurred during the Cretaceous. This study discusses the origin of the unconformity surfaces (K-0, K-1 and K-1A) that separate Sequences 1, 2A and 2B and the sedimentary characteristics of the Bauru, Sanfranciscana and Parecis Basins from the Aptian to the Maastrichtian, comparing the results with other Cretaceous Brazilian basins. The lower Cretaceous Sequence 1 (Caiua and Areado groups) is interpreted as a lowaccommodation systems tract compound by fluvial and aeolian systems. The upper Cretaceous lacustrine, braided river-dominated alluvial fan and aeolian systems display characteristics of the evolution from high-to low-accommodation systems tracts (Sequences 2A and 2B). Unconformity K-0 is related to the origin of the Bauru Basin itself in the Early Cretaceous. In Sanfranciscana and Parecis basins, the unconformity K-0 marks the contact between aeolian deposits from Lower Cretaceous and Upper Cretaceous alluvial systems (Sequences 1 and 2). Unconformity K-1, which was generated in the Late Cretaceous, is related to an increase of the A\/S ratio, whereas Unconformity K-1A is the result of the decrease in the A\/S ratio. Unconformity K-1A bound Sequence 2A (lacustrine and fluvial systems) and Sequence 2B (alluvial deposits) in Bauru Basin whereas in the Sanfranciscana and Parecis basins this unconformity marks the transition from alluvial system to aeolian system (Sequences 2A and 2B). Changes in depositional style in both basins correspond to two distinct tectonic moments occurring within the South American plate. The first associated with post-volcanic thermal subsidence of the Early Cretaceous (Serra Geral and Tapirapu~a volcanismos), and the second moment associated with the uplift occurred in the Late Cretaceous (Alto Parana\u00edba, Vilhena and Serra Formosa Arcs).<\/div>\n\n\n\n

Keywords: Bauru Basin; Sanfranciscana Basin; Parecis Basin; Continental sequences; Paleosls; Tectonics; Climate.<\/p>\n<\/blockquote>\n\n\n\n

<\/div>\n\n\n\n
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SOARES, Samia Passarella; LADEIRA, Francisco S\u00e9rgio Bernardes; LIESENBERG, Veraldo. MORFOMETRIA DA BACIA DO RIO S\u00c3O JO\u00c3O, MG: uma proposta de entendimento dos limites e da din\u00e2mica das superf\u00edcies erosivas. <\/span>Revista Brasileira de Geomorfologia<\/strong>, v. 17, n. 2, p. 242-252, 30 jun. 2016.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

Os par\u00e2metros morfom\u00e9tricos da superf\u00edcie do relevo s\u00e3o essenciais para a caracteriza\u00e7\u00e3o e o entendimento da forma\u00e7\u00e3o de uma paisagem, especialmente em \u00e1reas que passaram por processos erosivos e tect\u00f4nicos bem marcados, como o caso da regi\u00e3o da Bacia do Rio S\u00e3o Jo\u00e3o, no sudoeste de Minas Gerais. Com o prop\u00f3sito de reconhecer os tra\u00e7os tect\u00f4nicos que pudessem interferir no desenvolvimento do canal e por fim afetar os ciclos erosivos, foram realizadas uma s\u00e9rie de an\u00e1lises geomorfol\u00f3gicas; tais como a Isobase, o Fator de simetria topogr\u00e1fica transversal com assimetria da bacia de drenagem  e a Curva e integral hipsom\u00e9trica. Estes \u00edndeces foram produzidos atrav\u00e9s do software TecDEM, que compilou em sua interfacie de trabalho todo o procedimento e rotina, utilizando-se apenas das informa\u00e7\u00f5es espaciais do modelo digital de eleva\u00e7\u00e3o (SRTM). Estas an\u00e1lises, favoreceram satisfatoriamente o entendimento das estruturas e do relevo no contexto da bacia, assim evidenciando os dom\u00ednios topogr\u00e1ficos e limites das superf\u00edcies, a din\u00e2mica erosiva,  o deslocamento dos canais pertencentes as bacias de quarta e quinta ordem, e por fim o momento de transi\u00e7\u00e3o do relevo.<\/div>\n\n\n\n

Palavras-chave: Par\u00e2metros Morfom\u00e9tricos; Superf\u00edcies Erosivas; Bacia do Rio S\u00e3o Jo\u00e3o.<\/p>\n<\/blockquote>\n\n\n\n

<\/div>\n\n\n\n
\n

SILVA, M. L. ; BATEZELLI, A.<\/a> ; LADEIRA, F. S. B. Uso de estimativas de paleoprecipita\u00e7\u00e3o e paleotemperatura em paleossolos cret\u00e1ceos no Brasil: abordagem cr\u00edtica.<\/span><\/strong> Geochimica Brasiliensis<\/strong>, v. 30, p. 72-83, 2016.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

O presente trabalho tem como objetivo discutir a aplicabilidade e as limita\u00e7\u00f5es do uso de estimativas de paleoprecipita\u00e7\u00e3o e paleotemperatura em
paleossolos da Forma\u00e7\u00e3o Mar\u00edlia, Neocret\u00e1ceo da Bacia Bauru. Foram descritas tr\u00eas se\u00e7\u00f5es (A1, A2 e A3), compreendendo nove perfis. Os elementos maiores, menores e tra\u00e7os foram determinados por Espectrometria de Fluoresc\u00eancia de Raios-X e as estimativas se basearam em equa\u00e7\u00f5es exponenciais e regress\u00f5es lineares. Na Forma\u00e7\u00e3o Mar\u00edlia, os paleossolos desenvolvidos sobre arenitos apresentam horizontes arg\u00edlicos (Btk e Bt) e carbon\u00e1ticos (Bk) com distintos graus de cimenta\u00e7\u00e3o, constituindo-se calcretes em sua maioria. Os paleossolos com Bk apresentaram valores m\u00e9dios de 420 e 500 mm\/ano, respectivamente para as se\u00e7\u00f5es Botucatu (A1) e Gar\u00e7a (A3). Nos paleossolos com Bt, a m\u00e9dia de paleoprecipita\u00e7\u00e3o foi 881 mm\/ano e a m\u00e9dia anual de paleotemperatura foi de 10 \u00baC. Paleossolos com Btk revelaram valores m\u00e9dio de precipita\u00e7\u00e3o de 605 mm\/ano. As varia\u00e7\u00f5es de precipita\u00e7\u00e3o, tomadas individualmente e indutivamente, proporcionaram a defini\u00e7\u00e3o de tr\u00eas intervalos paleoclim\u00e1ticos para o Maastrichtiano da Bacia
Bauru. No entanto, a variabilidade dos atributos verticais e horizontais dos solos, bem como o uso excluso dessa t\u00e9cnica como principal m\u00e9todo, inviabilizaram a utiliza\u00e7\u00e3o das climofun\u00e7\u00f5es, que n\u00e3o alcan\u00e7aram consenso, em estudos paleoclim\u00e1ticos.<\/div>\n\n\n\n

Palavras-Chave: Calcrete, Climofun\u00e7\u00f5es, Paleoclimas, Bacia Bauru, Forma\u00e7\u00e3o Mar\u00edlia.<\/p>\n<\/blockquote>\n\n\n\n

<\/div>\n\n\n\n
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\"\" 2015<\/p>\n\n\n\n

\n

PEREIRA, C. T. ; BATEZELLI, A.<\/a> ; LADEIRA, F. S. B.<\/a> Paleoprecipitation Changes Based on Paleosols Profiles of the Mar\u00edlia Formation (Upper Cretaceous) in the Eastern Portion of the Bauru Basin in Southeastern Brazil.<\/span> Geoci\u00eancias<\/strong>, v. 34, p. 238-257, 2015.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

A Forma\u00e7\u00e3o Mar\u00edlia \u00e9 sequ\u00eancia Maastrichtiana da Bacia Bauru que aflora na regi\u00e3o Sudeste do Brasil. Esta forma\u00e7\u00e3o \u00e9 constitu\u00edda por uma sucess\u00e3o de dep\u00f3sitos alluviais marcado pela altern\u00e2ncia de estratos sedimentares e paleossolos. Fei\u00e7\u00f5es pedog\u00eanicas relacionados a fatores clim\u00e1ticos podem ser usados como uma ferramenta para a interpreta\u00e7\u00e3o de paleoambientes. Atrav\u00e9s de descri\u00e7\u00f5es macro e microsc\u00f3picas, an\u00e1lise mineral\u00f3gica e geoqu\u00edmica foram identificados vinte perfis de paleossolos na Forma\u00e7\u00e3o Mar\u00edlia. A caracteriza\u00e7\u00e3o geoqu\u00edmica de horizontes C, Ck, Bt, Btk e Gley permitiu identificar condi\u00e7\u00f5es paleoclim\u00e1ticos que influenciam a forma\u00e7\u00e3o de paleossolos. Mudan\u00e7as nos processos de forma\u00e7\u00e3o desses paleossolos foram provocados principalmente por varia\u00e7\u00f5es de umidade. Estimativas de paleoprecipita\u00e7\u00e3o (MAP) obtidos a partir de valores CIA-K em horizontes Bt e Btk indicam que as taxas de precipita\u00e7\u00e3o variou de 20 a 1000 mm\/ano. Estas condi\u00e7\u00f5es clim\u00e1ticas contrastantes causou a sobreposi\u00e7\u00e3o de perfis de paleossolos distintas, sugerindo per\u00edodos de oscila\u00e7\u00e3o de \u00e1rido a semi-\u00e1rido. Os resultados deste trabalho contribuem para um melhor entendimento do clima do Cret\u00e1ceo Superior na Regi\u00e3o Sudeste do Brasil.<\/div>\n\n\n\n

Palavras-chave: Bacia Bauru, Forma\u00e7\u00e3o Mar\u00edlia, paleossolos, Paleoprecipita\u00e7\u00e3o, Maastrichtiano.<\/p>\n<\/blockquote>\n\n\n\n

<\/div>\n\n\n\n
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CELARINO, A. L. S.<\/a> ; LADEIRA, F. S. B.<\/a> Origem da mat\u00e9ria org\u00e2nica em solos da plan\u00edcie fluvial do Rio Pardo (SP) atrav\u00e9s de is\u00f3topos est\u00e1veis de carbono e nitrog\u00eanio<\/span><\/strong>. Revista Equador<\/strong>, v. 4, p. 432-439, 2015.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

A associa\u00e7\u00e3o entre formas de relevo e antigos perfis de altera\u00e7\u00e3o \u00e9 bastante comum na literatura. No Brasil h\u00e1 diversas refer\u00eancias, em especial \u00e0 associa\u00e7\u00e3o entre perfis de altera\u00e7\u00e3o e paleosuperf\u00edcies, especialmente as posicionadas em condi\u00e7\u00f5es de cimeira na paisagem. Essa associa\u00e7\u00e3o deve ser realizada com certa reserva, entretanto novos procedimentos metodol\u00f3gicos permitem o uso mais seguro deste tipo de informa\u00e7\u00e3o.<\/div>\n\n\n\n

Palavras-chave: paleosuperf\u00edcie, perfis de altera\u00e7\u00e3o, ferricrete<\/p>\n<\/blockquote>\n\n\n\n

<\/div>\n\n\n\n
\n

LADEIRA, F. S. B.<\/a> Paleosuperf\u00edcies e perfis de altera\u00e7\u00e3o associados: possibilidades e limita\u00e7\u00f5es na reconstitui\u00e7\u00e3o de paleopaisagens<\/span><\/strong>. Revista Equador<\/strong>, v. 4, p. 134-145, 2015.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

A associa\u00e7\u00e3o entre formas de relevo e antigos perfis de altera\u00e7\u00e3o \u00e9 bastante comum na literatura. No Brasil h\u00e1 diversas refer\u00eancias, em especial \u00e0 associa\u00e7\u00e3o entre perfis de altera\u00e7\u00e3o e paleosuperf\u00edcies, especialmente as posicionadas em condi\u00e7\u00f5es de cimeira na paisagem. Essa associa\u00e7\u00e3o deve ser realizada com certa reserva, entretanto novos procedimentos metodol\u00f3gicos permitem o uso mais seguro deste tipo de informa\u00e7\u00e3o.<\/div>\n\n\n\n

Palavras-chave: paleosuperf\u00edcie, perfis de altera\u00e7\u00e3o, ferricrete<\/p>\n<\/blockquote>\n\n\n\n

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\n

SILVA, M.L. ; BATEZELLI, A.<\/a> ; <\/strong>LADEIRA, F. S. B.<\/a> \u00cdndices de intemperismo e evolu\u00e7\u00e3o dos paleossolos da Forma\u00e7\u00e3o Mar\u00edlia, Maastrichtiano da Bacia neocret\u00e1cea Bauru.<\/span><\/strong> Geochimica Brasiliensis<\/strong>, v. 29, p. 127-138, 2015.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

O presente trabalho tem como objetivo determinar o \u00edndice de intemperismo m\u00e9dio (m), de altera\u00e7\u00e3o geoqu\u00edmica (CIA-K) e de morfologia (MI) para avaliar o grau de evolu\u00e7\u00e3o dos paleossolos da Forma\u00e7\u00e3o Mar\u00edlia, Maastrichtiano da Bacia Bauru. Foram descritas tr\u00eas se\u00e7\u00f5es da Forma\u00e7\u00e3o Mar\u00edlia (A1, A2 e A3), compreendendo nove perfis. Na caracteriza\u00e7\u00e3o das se\u00e7\u00f5es, horizontes carbon\u00e1ticos (Bkm) e arg\u00edlicos (Btkm e Bt) foram identificados nos paleossolos da \u00e1rea de estudo. Os \u00edndices de intemperismo m\u00e9dio, de altera\u00e7\u00e3o geoqu\u00edmica
e de morfologia foram determinados para os horizontes dos paleossolos, de acordo com a literatura especializada. Os paleossolos com horizonte Bt foram os mais intemperizados, indicativos de per\u00edodos com maiores taxas de precipita\u00e7\u00e3o e lixivia\u00e7\u00e3o no Maastrichtiano da Bacia Bauru. Os paleossolos com horizonte Bkm apresentaram os menores \u00edndices sendo, portanto, testemunhos de per\u00edodos de maior semiaridez da Forma\u00e7\u00e3o Mar\u00edlia. No entanto, apesar de apresentarem baixos \u00edndices, os paleossolos com Bkm podem ser considerados evolu\u00eddos em condi\u00e7\u00f5es semi\u00e1ridas, pois apresentaram est\u00e1gios de cimenta\u00e7\u00e3o carbon\u00e1tica III e V.<\/div>\n\n\n\n

Palavras-chave: geoqu\u00edmica, horizontes Bkm, Btkm e Bt, mineralogia de solos<\/p>\n<\/blockquote>\n\n\n\n

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CHELIZ, Pedro Michelutti. Interface entre quadros de relevo cuestiformes e registros arqueol\u00f3gicos l\u00edticos: cercanias de Araraquara, Nordes Paulista, S\u00e3o Paulo, Brasil<\/span><\/strong>. Meridiano – Revista de Geografia<\/strong>. n.4. 2015.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

Dentro das rediscuss\u00f5es dos modelos de povoamento do sul-sudeste brasileiro, realizou-se interface entre quadros geom\u00f3rficos e registro arqueol\u00f3gico \u2013 enfatizado em s\u00edtios l\u00edticos \u2013 de segmento das escarpas cuestiformes do estado de S\u00e3o Paulo. A \u00e1rea corresponde \u00e0s imedia\u00e7\u00f5es da cidade de Araraquara, no nordeste paulista. Foi efetuada compartimenta\u00e7\u00e3o do relevo local, invent\u00e1rio e descri\u00e7\u00e3o de suas caracter\u00edsticas sum\u00e1rias, bem como levantamento da localiza\u00e7\u00e3o e atributos essenciais dos s\u00edtios arqueol\u00f3gicos l\u00edticos. Dados foram usados para discutir inser\u00e7\u00e3o dos s\u00edtios arqueol\u00f3gicos no meio f\u00edsico-natural. Aten\u00e7\u00e3o especial foi dada ao s\u00edtio l\u00edtico Boa Esperan\u00e7a II, cuja data\u00e7\u00e3o a ele atribu\u00edda (14500+-3000 anos antes do presente, por data\u00e7\u00e3o de fotoluminesc\u00eancia) possibilita discutir sua inser\u00e7\u00e3o na categoria de s\u00edtios pleistoc\u00eanicos. Inter-rela\u00e7\u00f5es dos dados inserem-se adequadamente nos conhecimentos da din\u00e2mica geomorfogen\u00e9tica conhecida, e auxiliam a explicar localiza\u00e7\u00e3o do s\u00edtio Boa Esperan\u00e7a II. Aceita\u00e7\u00e3o desta op\u00e7\u00e3o interpretativa pela perspectiva da geografia f\u00edsica e ci\u00eancias da terra n\u00e3o encontra maiores implica\u00e7\u00f5es, por\u00e9m na \u00f3tica arqueol\u00f3gica colaboraria para rediscuss\u00f5es sobre antiguidade da ocupa\u00e7\u00e3o humana no estado de S\u00e3o Paulo e sulsudeste do Brasil. Evidencia-se necessidade de aprofundamento de discuss\u00f5es e estudos interdisciplinares para adensar perspectivas de an\u00e1lise dos conhecimentos da ocupa\u00e7\u00e3o humana local, e sua intera\u00e7\u00e3o com cen\u00e1rios pret\u00e9ritos da antiguidade do povoamento. <\/div>\n<\/blockquote>\n\n\n\n
<\/div>\n\n\n\n
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\"\" 2014<\/p>\n\n\n\n

\n

CELARINO, A. L. S.<\/a> ; LADEIRA, F. S. B.<\/a><\/strong> An\u00e1lise Morfom\u00e9trica da Bacia do Rio Pardo (MG e SP)<\/span><\/strong>. Revista Brasileira de Geomorfologia<\/strong>, v. 15, p. 471-491, 2014.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

Os estudos neotect\u00f4nicos t\u00eam sido utilizados no Brasil com o objetivo de entender como os movimentos da crosta terrestre desde o Paleoceno foram capazes de formar as fei\u00e7\u00f5es geomorfol\u00f3gicas atuais. Desde ent\u00e3o, uma s\u00e9rie de estudos vem sendo realizado, geralmente em escala regional, com o intuito de gerar informa\u00e7\u00f5es para sistematizar tais dados. Este trabalho utilizou-se da geomorfologia fluvial para investigar os par\u00e2metros morfom\u00e9tricos que pudessem indicar a exist\u00eancia ou n\u00e3o de mudan\u00e7as ambientais em virtude de movimentos neotect\u00f4nicos na bacia do rio Pardo. O objetivo foi o de contribuir com uma an\u00e1lise regional relativamente r\u00e1pida e eficiente, atrav\u00e9s de fei\u00e7\u00f5es an\u00f4malas identificadas na bacia que pudessem ser indicativas de alguma interfer\u00eancia neotect\u00f4nica, utilizando para isso par\u00e2metros como: densidade de drenagem, \u00edndice SL (Stream Gradient Index), perfis longitudinais do rio principal e de 11 dos maiores tribut\u00e1rios. O conjunto de t\u00e9cnicas utilizadas foi adequado para identificar anomalias de drenagem na bacia, sendo poss\u00edvel inclusive classific\u00e1-las como de origem distintas. Tais anomalias est\u00e3o relacionadas a dois momentos distintos: movimentos antigos do fim do ciclo brasiliano, relacionados a falhas e zonas de cisalhamento compressivo nas prov\u00edncias tect\u00f4nicas Tocantins e Mantiqueira, ao sul do cr\u00e1ton de S\u00e3o Francisco; movimentos tect\u00f4nicos mais recentes, relacionados a um conjunto de falhas normais oriundas da abertura do Atl\u00e2ntico e reativa\u00e7\u00e3o da placa Sul Americana. N\u00e3o foram encontradas evid\u00eancias de movimenta\u00e7\u00f5es tect\u00f4nicas quatern\u00e1rias, ou tais movimentos foram pouco expressivos e n\u00e3o produziram evid\u00eancias suficientes.<\/div>\n\n\n\n

Palavras-chave: Geomorfologia fluvial; Rio Pardo; Dep\u00f3sitos fluviais<\/p>\n<\/blockquote>\n\n\n\n

<\/div>\n\n\n\n
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BATEZELLI, A.<\/a> ; LADEIRA, F. S. B.<\/a> ; ASSINE, M. L. Ambientes Deposicionais e Evolu\u00e7\u00e3o Estratigr\u00e1fica do Cret\u00e1ceo Superior da Bacia dos Parecis<\/span><\/strong>. Geoci\u00eancias<\/strong>, v. 33, p. 429-448, 2014.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

Embora haja muitas publica\u00e7\u00f5es sobre as bacias cret\u00e1cicas brasileiras, o entendimento sobre processos tect\u00f4nicos e clim\u00e1ticos envolvidos na evolu\u00e7\u00e3o das sequ\u00eancias continentais ainda carece de estudos, sobretudo aqueles relacionados \u00e0 por\u00e7\u00e3o centro-oeste do pa\u00eds. A sequ\u00eancia sedimentar do Cret\u00e1ceo Superior da Bacia dos Parecis, se assenta discordantemente sobre rochas vulc\u00e2nicas das forma\u00e7\u00f5es Anar\u00ed e Tapirapu\u00e3 (Jur\u00e1ssico Inferior) e arenitos do Cret\u00e1ceo Inferior da Forma\u00e7\u00e3o Rio \u00c1vila. \u00c9 constitu\u00edda por uma sucess\u00e3o de estratos conglomer\u00e1ticos e arenosos na base (Forma\u00e7\u00e3o Salto das Nuvens) sobreposta por estratos arenosos no topo (Forma\u00e7\u00e3o Utiariti). A partir da an\u00e1lise de f\u00e1cies e arquitetura estratigr\u00e1fica, foi elaborado um modelo paleoambiental e uma proposta de evolu\u00e7\u00e3o que contempla aspectos tect\u00f4nicos e clim\u00e1ticos dessa por\u00e7\u00e3o brasileira. Usando o conceito de n\u00edvel de base estratigr\u00e1fico e\/ou a raz\u00e3o entre espa\u00e7o de acomoda\u00e7\u00e3o e suprimento sedimentar (A\/S), foi identificado o padr\u00e3o de empilhamento aluvial e e\u00f3lico, que corresponde aos diferentes est\u00e1gios da Tect\u00f4nica Juru\u00e1. Os eventos de sedimenta\u00e7\u00e3o que deram origem a sequ\u00eancia tiveram in\u00edcio ap\u00f3s a g\u00eanese de uma discord\u00e2ncia regional (Discord\u00e2ncia K-1) entre o Cret\u00e1ceo Precoce e Tardio. Durante o Cret\u00e1ceo Tardio a Bacia dos Parecis abrigou um ciclo de sedimenta\u00e7\u00e3o aluvial (Sequ\u00eancia 1A) e outro e\u00f3lico (Sequ\u00eancia 1B). O primeiro registra o aumento na raz\u00e3o A\/S onde se desenvolveram sistemas de leques retrabalhados por rios entrela\u00e7ados e dunas e\u00f3licas baixas (Trato de Sistema de Alta Acomoda\u00e7\u00e3o \u2013 HST). Progressivamente o espa\u00e7o de acomoda\u00e7\u00e3o foi diminuindo, fazendo
com que os dep\u00f3sitos aluviais fossem colmatados por campos de dunas (Trato de Sistema de Baixa Acomoda\u00e7\u00e3o \u2013 LST). Nesse per\u00edodo a raz\u00e3o A\/S tendeu a 1, chegando a ser negativa nos est\u00e1gios finais, com poss\u00edvel by-pass sedimentar e g\u00eanese da Discord\u00e2ncia K-2. A varia\u00e7\u00e3o de f\u00e1cies da base para o topo registra mudan\u00e7a nas condi\u00e7\u00f5es de clim\u00e1ticas da bacia, passando de um ambiente mais \u00famido para mais seco. Dados de paleocorrentes indicam que o Alto de Tapaj\u00f3s ao norte da bacia esteve ativo, sendo a \u00e1rea fonte dos sedimentos. <\/div>\n\n\n\n

Palavras-chave: Bacia dos Parecis, F\u00e1cies Aluvial, F\u00e1cies E\u00f3lica, Sequencia Estratigr\u00e1fica, Espa\u00e7o de Acomoda\u00e7\u00e3o, Suprimento de Sedimento.<\/p>\n<\/blockquote>\n\n\n\n

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LEONARDI, F. A.<\/a> ; LADEIRA, F. S. B.<\/a> Mapeamento das Superf\u00edcies Later\u00edticas de Ferro na Regi\u00e3o da Serra do Cara\u00e7a e Correla\u00e7\u00f5es Altim\u00e9tricas ? Leste do Quadril\u00e1tero Ferr\u00edfero\/MG. <\/span>Revista Geonorte<\/strong>, v. 10, p. 112-116, 2014.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

Neste trabalho mapeou-se a superf\u00edcie later\u00edtica de ferro na regi\u00e3o da Serra do Cara\u00e7a, a 900m de altitude, inferindo-se correla\u00e7\u00f5es altim\u00e9tricas desta com as \u00e1reas adjacentes. Os resultados apontam para dois momentos de forma\u00e7\u00e3o da superf\u00edcie: a) os dep\u00f3sitos de clastos de itabirito, que recobrem os sedimentos finos da bacia de Fonseca, indicando um momento de alta energia em um leque aluvial; b) forma\u00e7\u00e3o de espesso manto de ferricrete que afetam estes dep\u00f3sitos.<\/div>\n\n\n\n

Palavras-chave: Quadril\u00e1tero Ferr\u00edfero; Superf\u00edcie Later\u00edtica; Patamares Altim\u00e9tricos<\/p>\n<\/blockquote>\n\n\n\n

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CELARINO, A. L. S.<\/a> ; LADEIRA, F. S. B.<\/a> Ambientes de Deposi\u00e7\u00e3o e Geoqu\u00edmica de Dep\u00f3sitos Fluviais da Bacia do M\u00e9dio\/Baixo Rio Pardo (SP).<\/span><\/strong> Revista Geonorte<\/strong>, v. 10, p. 28-31, 2014.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

O Rio Pardo nasce em Ipui\u00fana-MG e escoa por rochas da Prov\u00edncia Tocantins para a Bacia do Paran\u00e1 apresentando canal retil\u00edneo, sendo que alguns setores assumem car\u00e1ter meandrante com canais abandonados e uma extensa plan\u00edcie fluvial. Perfis de dep\u00f3sitos aluviais foram analisados em um destes trechos e unidades geomorfol\u00f3gicas foram caracterizadas com base em an\u00e1lises granulom\u00e9tricas e geoqu\u00edmicas com o objetivo de identificar o ambiente de deposi\u00e7\u00e3o e processos de altera\u00e7\u00e3o pedogen\u00e9tica.<\/div>\n\n\n\n

Palavras-chave: Geomorfologia fluvial; Rio Pardo; Dep\u00f3sitos fluviais<\/p>\n<\/blockquote>\n\n\n\n

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\"\" 2013<\/p>\n\n\n\n

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CHELIZ, Pedro Michelutti. Bases f\u00edsico-ambientais da pesquisa arqueol\u00f3gica: o estado de S\u00e3o Paulo<\/strong>. <\/span>Revista do Museu de Arqueologia e Etnologia Universidade de Sao Paulo<\/strong>, Agencia USP de Gestao da Informacao Academica (AGUIA) n. 23, p. 49-60, 26 dez. 2013.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

A arqueologia como ci\u00eancia interdisciplinar requer a interface de m\u00faltiplas \u00e1reas do conhecimento, inclusive as ci\u00eancias da terra. Seus praticantes na maioria s\u00e3o provindos das ci\u00eancias humanas, tendo muitas vezes dificuldades de inserir a tem\u00e1tica do quadro natural em suas an\u00e1lises e estudos. Procurando auxiliar a suprir este lapso, o presente trabalho procura realizar uma sistematiza\u00e7\u00e3o orientada para a arqueologia dos aspectos gerais de conhecimentos acumulados do quadro f\u00edsico-ambiental do estado de S\u00e3o Paulo, que sintetiza adequadamente quadro paisag\u00edstico do Brasil Meridional. Atrav\u00e9s de revis\u00e3o bibliogr\u00e1fica e experi\u00eancia de trabalhos de campo, o trabalho sintetiza as principais implica\u00e7\u00f5es para a ocupa\u00e7\u00e3o humana dos principais quadros paisag\u00edsticos de S\u00e3o Paulo, elencando diferenciadas potencialidades e restri\u00e7\u00f5es associadas.<\/div>\n<\/blockquote>\n\n\n\n
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CELARINO, Andr\u00e9 Luiz de Souza; SOUZA, Melina Mara de; LADEIRA, Francisco Sergio Bernardes; BRANCO, Fresia Soledad Ricardi Torres. Paleoenvironmental reconstruction of the Lower Mogi Gua\u00e7u River Basin (S\u00e3o Paulo State \u2014 Brazil), morphopedosedimentary records and fluvial processes<\/span><\/strong>. Catena<\/strong>, v. 111, p. 80-97, dez. 2013. Elsevier BV.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

O rio Mogi Gua\u00e7u nasce em Bom Repouso (Minas Gerais – Brasil), na Serra da Mantiqueira, e des\u00e1gua no rio Pardo a uma altitude de 483 m no Pontal (Estado de S\u00e3o Paulo – Brasil), ap\u00f3s percorrer um curso de 530 km. Principalmente ao longo da Bacia do Baixo Mogi Gua\u00e7u, a morfologia do rio \u00e9 extremamente sinuosa, caracterizada por intensos processos de migra\u00e7\u00e3o do canal, avuls\u00e3o, abandono e reativa\u00e7\u00e3o do canal, produzindo uma extensa plan\u00edcie aluvial composta por uma s\u00e9rie de formas de relevo associadas e f\u00e1cies sedimentares. Entre essas formas, dep\u00f3sitos de barras pontuais por acre\u00e7\u00e3o lateral, meandros abandonados, paleocanais e terra\u00e7os fluviais s\u00e3o caracter\u00edsticas not\u00e1veis. Nesse sentido, o objetivo deste trabalho foi investigar se essas caracter\u00edsticas poderiam estar associadas a mudan\u00e7as ambientais. Para tanto, foram analisados \u200b\u200bos atributos do solo de uma catena da Esta\u00e7\u00e3o Ecol\u00f3gica de Jata\u00ed (Luiz Antonio – SP) em quatro setores: Vertente, Terra\u00e7o I, Terra\u00e7o II e Plan\u00edcie Aluvial. Os resultados da determina\u00e7\u00e3o do tamanho do gr\u00e3o, estudos geoqu\u00edmicos e isot\u00f3picos, data\u00e7\u00e3o, paleopalinologia, fragmentos de carv\u00e3o e micromorfologia s\u00e3o apresentados neste artigo. A partir dessas an\u00e1lises, \u00e9 proposta uma evolu\u00e7\u00e3o paleoambiental dividida em tr\u00eas est\u00e1gios para a \u00e1rea: 130.000 YBP (Alto Pleistoceno), quando o n\u00edvel da base do rio Mogi Gua\u00e7u estava aproximadamente 6 m acima do atual; uma segunda fase mais seca 10.250 anos AP (Holoceno Inferior), quando um horizonte org\u00e2nico se formou dentro de um meandro abandonado, e uma terceira fase, 2096 YBP (Holoceno Superior), de reativa\u00e7\u00e3o de um clima quente e \u00famido que promoveu o desenvolvimento de um solo de dois metros de espessura em um setor onde o rio Mogi Gua\u00e7u n\u00e3o mais inunda devido \u00e0 incis\u00e3o de seu talvegue, atingindo mais de seis metros de profundidade nos \u00faltimos 130.000 anos AP. Assim, este artigo usou uma abordagem geomorfol\u00f3gica fluvial e sua intera\u00e7\u00e3o com o clima para entender como a paisagem foi moldada do Pleistoceno Superior ao Holoceno, no entanto, a neotect\u00f4nica pode ter desempenhado um papel relevante, n\u00e3o apenas na bacia do rio Mogi Gua\u00e7u, mas tamb\u00e9m na Bacia Sedimentar do Paran\u00e1.<\/div>\n\n\n\n

Keywords: Alluvial soils; Paleopalunology; Environmental changes; Fluvial geomorphology processes; Floodplains <\/p>\n<\/blockquote>\n\n\n\n

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\"\" 2012<\/p>\n\n\n\n

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LADEIRA, Francisco S\u00e9rgio Bernardes. A a\u00e7\u00e3o antr\u00f3pica sobre os solos nos diferentes biomas brasileiros \u2013 terras ind\u00edgenas e solos urbanos<\/span><\/strong> – Entre-Lugar<\/strong>, Dourados, MS, ano 3, n.6, p127 – 139, 2. semestre de 2012.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

O solo \u00e9 resultante da intera\u00e7\u00e3o de fatores e processos que s\u00e3o respons\u00e1veis pelas caracter\u00edsticas particulares de cada tipo de solo. O homem h\u00e1 mil\u00eanios pode ser destacado como um dos \u201cfatores\u201d de forma\u00e7\u00e3o dos solos. No Brasil, nos diferentes biomas, h\u00e1 exemplos dessa a\u00e7\u00e3o, sejam a\u00e7\u00f5es milenares como a \u201cTerra Preta de \u00cdndios\u201d na Amaz\u00f4nia ou a a\u00e7\u00e3o sobre os solos nas \u00e1reas urbanas brasileiras em per\u00edodos mais recentes. Como agente formador de solos, mas principalmente como agente que o degrada, o homem assume a cada dia maior import\u00e2ncia como agente pedogen\u00e9tico, levando \u00e0 proposta de cria\u00e7\u00e3o, em diferentes sistemas de classifica\u00e7\u00e3o, da ordem dos Antropossolos.<\/div>\n\n\n\n

Palavras-chave: Antropossolo, pedog\u00eanese, Terra Preta de \u00cdndios<\/p>\n<\/blockquote>\n\n\n\n

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\"\" 2011<\/p>\n\n\n\n

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CELARINO, Andr\u00e9 Luiz de Souza; LADEIRA, Francisco S\u00e9rgio Bernardes. Mineralogy of the clay fraction of soils on topossequence in a transition slope-Quaternary alluvial sediments of the Mogi Gua\u00e7u river in the ecological station of Jata\u00ed, Luis Ant\u00f4nio, SP<\/span><\/strong> – S\u00e3o Paulo, UNESP, Geoci\u00eancias<\/strong>, v. 30, n. 1, 2011.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

Atrav\u00e9s da an\u00e1lise mineral\u00f3gica dos solos da toposseq\u00fc\u00eancia \u201cInfern\u00e3o\u201d objetivou-se entender quais informa\u00e7\u00f5es a pedog\u00eanese poderia fornecer acerca de como se configura a transi\u00e7\u00e3o vertente\/sedimentos aluviais quatern\u00e1rios do terra\u00e7o do rio Mogi Gua\u00e7\u00fa, qual o papel do relevo e do material de origem na g\u00eanese dos solos na Esta\u00e7\u00e3o Ecol\u00f3gica de Jata\u00ed (EEJ), em Luis Ant\u00f4nio-SP. Para isso foi observada a seq\u00fc\u00eancia Basalto-Arenito e a v\u00e1rzea do rio Mogi Gua\u00e7\u00fa, peculiar pelos seus in\u00fameros meandros abandonados. Os resultados indicam que na topossequ\u00eancia \u201cInfern\u00e3o\u201d existem duas din\u00e2micas bastante distintas, o segmento III responde a uma din\u00e2mica mais associada aos materiais que foram depositados na antiga plan\u00edcie aluvial do rio Mogi Gua\u00e7u, com pouca contribui\u00e7\u00e3o de material coluvial, enquanto que os setores I e II respondem a uma din\u00e2mica associada \u00e0 sua posi\u00e7\u00e3o na vertente e estritamente relacionada ao tipo de rocha a qual est\u00e1 associada. Palavras-chave: Mineralogia, Pedog\u00eanese, rio Mogi Gua\u00e7\u00fa.<\/div>\n\n\n\n

Palavras-chave: Mineralogia; Pedog\u00eanese; rio Mogi Gua\u00e7\u00fa<\/p>\n<\/blockquote>\n\n\n\n

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GOBBI, Est\u00e9fano Seneme; LADEIRA, Francisco S\u00e9rgio Bernardes. Proposta para mapeamento de riscos associados a movimento de massa e inunda\u00e7\u00e3o: o caso de Ubatuba, SP<\/span><\/strong> – S\u00e3o Paulo, UNESP, Geoci\u00eancias<\/strong>, v. 30, n. 3, 2011.<\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

Na Serra do Mar s\u00e3o verificados periodicamente eventos de escorregamentos de massa nas vertentes escarpadas. Os escorregamentos s\u00e3o inerentes \u00e0 regi\u00e3o, propiciados pelo intenso intemperismo e associados concomitantemente a outros eventos em tempo geol\u00f3gico, como as consecutivas ingress\u00f5es e regress\u00f5es marinhas ocorridas no Quatern\u00e1rio. Como conseq\u00fc\u00eancia destas ocorr\u00eancias h\u00e1 uma carga de dep\u00f3sitos sedimentares alocados na Plan\u00edcie Costeira de Ubatuba, que \u00e9 classificada como praia de bolso, ou seja, uma pequena zona de deposi\u00e7\u00e3o de sedimentos, separada por indenta\u00e7\u00f5es do Cristalino, tornando a \u00e1rea de sedimenta\u00e7\u00e3o descontinua. Este trabalho visa identificar as \u00e1reas de dep\u00f3sitos marinhos, submersas na ultima ingress\u00e3o marinha (verificada h\u00e1 aproximadamente cinco mil anos), com uma eleva\u00e7\u00e3o da ordem de cinco metros em rela\u00e7\u00e3o ao atual e a rela\u00e7\u00e3o com os dep\u00f3sitos gravitacionais alocados na Plan\u00edcie Sedimentar, ocorridos posteriormente a varia\u00e7\u00e3o gl\u00e1cioeust\u00e1tica. Foram verificadas as evolu\u00e7\u00f5es dos n\u00edveis mar\u00edtimos ao longo do Holoceno, bem como a tipologia e morfologia de sua sedimenta\u00e7\u00e3o. Concomitantemente, foi verificada a ocorr\u00eancia de escorregamentos e seus dep\u00f3sitos correlativos sobre a plan\u00edcie marinha. Desta maneira, foi poss\u00edvel identificar as \u00e1reas sujeitas a riscos, principalmente nas escarpas, pr\u00f3ximas a encostas e leitos d’\u00e1gua.<\/div>\n\n\n\n

Palavras-chave: Ingress\u00e3o Marinha; Escorregamento de Massa; Pocket Beachs; Plan\u00edcie Costeira; Mapeamento de Riscos<\/p>\n<\/blockquote>\n\n\n\n

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LEONARDI, Fernanda Aparecida; LADEIRA, Francisco S\u00e9rgio Bernardes; dos SANTOS Marcilene. Paleosurfaces and bauxite profiles in the po\u00e7os de caldas plateau, S\u00e3o Paulo\/Minas Gerais, Brazil<\/span><\/strong>. Geoci\u00eancias<\/strong>, v. 30, n. 2, p. 147-160, 2011.<\/p>\n\n\n\n

\"\" ARTIGO<\/a> <\/strong> RESUMO<\/strong><\/span>

Este trabalho tem como objetivo correlacionar altimetria com os perfis baux\u00edticos no Planalto de Po\u00e7os deCaldas para identificar paleosuperf\u00edcies. Para tanto, classificaram-se e mapearam-se os perfis baux\u00edticos encontrados no Planalto sobre oMDE. Destacam-se na \u00e1rea tr\u00eas diferentes tipos de perfis baux\u00edticos: (1) os Perfis de Serra que s\u00e3o perfis bem evolu\u00eddos e espessos eest\u00e3o localizados nas \u00e1reas de maiores altitudes do Planalto; (2) os Perfis de Campo que s\u00e3o pouco espessos e muito argilosos,normalmente aparecem nas por\u00e7\u00f5es mais baixas da paisagem; (3) os Perfis Retrabalhados caracterizados por fragmentos retrabalhados debauxita compostos por materiais semelhantes aos encontrados nos topos dos Perfis de Serra e no de Campo. Depois de relacionadosaltimetria e os materiais constituintes dos perfis baux\u00edticos notam-se que h\u00e1 ocorr\u00eancias de Perfis Baux\u00edticos de Serra posicionados emaltimetrias de Perfis de Campo e Perfis retrabalhados posicionados sobre Perfis de Serra, acima dos 1.400 metros de altitude. No sentidooposto encontram-se topos de mesma altimetria, onde se acharia Perfis de Serra e o observado em campo s\u00e3o afloramentos rochosos, semqualquer evid\u00eancia de perfis later\u00edticos. Conclui-se, portanto, que as cotas altim\u00e9tricas, ao menos nesta \u00e1rea, n\u00e3o s\u00e3o, por si s\u00f3, bonsreferenciais para determinar paleosuperf\u00edcies.<\/div>\n<\/blockquote>\n<\/div><\/div>\n\n\n\n
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\"\" 2010<\/p>\n\n\n\n

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LEONARDI, Fernanda Aparecida; LADEIRA, Francisco S\u00e9rgio Bernardes; dos SANTOS Marcilene. Perfis baux\u00edticos do planalto de Po\u00e7os de Caldas SP\/MG – an\u00e1lise geoqu\u00edmica e posi\u00e7\u00e3o na paisagem<\/strong>.<\/span> Revista de Geografia<\/strong> (Programa de P\u00f3s-Gradua\u00e7\u00e3o da UFPE) v 27. 2010.<\/p>\n\n\n\n

\"\" ARTIGO<\/a> <\/strong> RESUMO<\/strong><\/span>

Este trabalho tem como objetivo principal classificar os perfis baux\u00edticos do planalto de Po\u00e7os de Caldas segundo an\u00e1lise geoqu\u00edmica e suas posi\u00e7\u00f5es na paisagem. Primeiramente fez-se um mapeamento dos perfis baux\u00edticos na \u00e1rea, com observa\u00e7\u00f5es de campo. Posteriormente foi realizado an\u00e1lise geoqu\u00edmica para diferenci\u00e1-los e relacion\u00e1-los com outros perfis anteriormente mapeados e tamb\u00e9m relacion\u00e1-los com a posi\u00e7\u00e3o que eles se encontram na paisagem. Encontraram-se no planalto tr\u00eas tipos de perfis baux\u00edticos: os perfis de Serra, de Campo e Retrabalhados. Conclui-se que os perfis baux\u00edticos de Serra est\u00e3o no topo do planalto, na maioria acima de 1400m, os de campo est\u00e3o em sua maioria na meia-encosta, entre 1300 e 1400m e os Retrabalhados abaixo de 1400m. Nota-se tamb\u00e9m de que os Perfis Baux\u00edticos Retrabalhados t\u00eam sua origem nos Perfis Baux\u00edticos de Serra, indicando uma maior altimetria dos perfis later\u00edticos de Serra na forma\u00e7\u00e3o dos dep\u00f3sitos, entretanto ocorrem algumas exce\u00e7\u00f5es, como alguns perfis Retrabalhados que est\u00e3o no mesmo patamar que perfis de Serra e perfis de Serra em patamares de perfis de Campo e ainda, patamares onde poderiam encontrar perfis de Serra, encontram-se rochas frescas. Estas evid\u00eancias indicam a import\u00e2ncia da tect\u00f4nica na \u00e1rea.<\/div>\n<\/blockquote>\n<\/div><\/div>\n\n\n\n
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<\/p>\n<\/blockquote>\n\n\n\n

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PERDOMO, Carolina Verbicaro; LADEIRA, Francisco Sergio Bernardes. Levantamento pedol\u00f3gico em vertente sujeita a movimentos de massa <\/span><\/strong>\u2013 Ubatuba (S\u00e3o Paulo, Brasil). Territorium<\/strong>, [S.L.], n. 17, p. 145-150, 10 ago. 2010. Coimbra University Press. <\/p>\n\n\n\n

\"\" ARTIGO<\/a> <\/strong> RESUMO<\/strong><\/span>

Os movimentos de massa s\u00e3o fen\u00f4menos naturais de evolu\u00e7\u00e3o das vertentes, mas podem corresponder a grandes riscos. A \u00e1rea de estudo localiza-se no litoral norte do Estado de S\u00e3o Paulo, Brasil. O objetivo do trabalho foi o de caracterizar macromorfologicamente os solos das vertentes, al\u00e9m de fazer a an\u00e1lise qu\u00edmica e mineral\u00f3gica de rotina. Os perfis s\u00e3o espessos e com varia\u00e7\u00e3o pedol\u00f3gica. A an\u00e1lise qu\u00edmica mostrou altos teores de alum\u00ednio e de hidrog\u00eanio.<\/div>\n<\/blockquote>\n\n\n\n
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LADEIRA, Francisco Sergio Bernardes. Solos do passado: origem e identifica\u00e7\u00e3o<\/span><\/strong>. Revista Brasileira de Ci\u00eancia do Solo<\/strong>, v. 34, n. 6, p. 1773-1786, 2010. <\/p>\n\n\n\n

\"\" ARTIGO<\/a> <\/strong> RESUMO<\/strong><\/span>

Solos resultam da intera\u00e7\u00e3o de fatores e processos operantes nas diferentes paisagens da superf\u00edcie terrestre. Ao longo do tempo geol\u00f3gico, essas paisagens se modificam, bem como os perfis de solo a elas associados. Decorrentes de processos e\u00f3licos, h\u00eddricos, tect\u00f4nicos, clim\u00e1ticos ou mesmo da atividade antr\u00f3pica, essas mudan\u00e7as remodelam a paisagem de forma gradual ou catastr\u00f3fica e, geralmente, irrevers\u00edvel, destruindo os solos associados. Entretanto, determinadas situa\u00e7\u00f5es permitem que os solos sejam originalmente preservados em \u00e1reas espec\u00edficas dessa paisagem pret\u00e9rita, incorporando-se a sequ\u00eancias sedimentares ou vulc\u00e2nicas, gerando os denominados paleossolos. Estes fornecem informa\u00e7\u00f5es e evid\u00eancias valiosas em estudos de reconstitui\u00e7\u00f5es paleoambientais, principalmente quando o registro fossil\u00edfero \u00e9 raro ou inexistente, na caracteriza\u00e7\u00e3o de antigas atmosferas e paleoclimas, de correla\u00e7\u00f5es estratigr\u00e1ficas, como indicativo de antigas superf\u00edcies de relevo, de certas concentra\u00e7\u00f5es minerais, de paleoprocessos pedogen\u00e9ticos, processos sedimentares, como indicativo de deriva continental, na geoarqueologia. No Brasil, pesquisas envolvendo paleossolos s\u00e3o ainda relativamente raras e recentes, cujo marco inicial data da d\u00e9cada de 1970, ao passo que nos Estados Unidos e na Europa pesquisas em que os paleossolos constituem o cerne da investiga\u00e7\u00e3o ou possuem papel de destaque est\u00e3o bastante avan\u00e7adas e disseminadas. Esta revis\u00e3o trata dos conceitos b\u00e1sicos da paleopedologia, objetivando despertar o interesse, no meio cient\u00edfico pedol\u00f3gico, para esse tema ainda pouco explorado no Pa\u00eds.<\/div>\n\n\n\n

Palavras-chave: paleopedologia, paleossolo, paleoambiente<\/p>\n<\/blockquote>\n<\/div><\/div>\n\n\n\n

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\"\" 2009<\/p>\n\n\n\n

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DALBO, P. F. F. ; BASILICI. G. ; ANGELICA, R. S. ; LADEIRA, F. S. B. Paleoclimatic interpretations from pedogenic calcretes in a Maastrichtian semi-arid eolian sand-sheet palaeoenvironment: Mar\u00edlia Formation (Bauru Basin, southeastern Brazil)<\/strong>.<\/span> Cretaceous Research, <\/strong>v. 30, p. 659-675, 2009.<\/p>\n\n\n\n

\"\" ARTIGO<\/a> <\/strong> RESUMO<\/strong><\/span>

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Stratigraphic and sedimentologic studies in continental successions do not always devote particular attention to the paleosols, in particular in arid or semi-arid paleoenvironments. The aim of this paper is to: (1) describe in detail the macro- and microscopic pedogenic features of four types of paleosol profiles with calcic horizons of the Mar\u00edlia Formation (Maastrichtian), and (2) elaborate paleoclimatic considerations based on the depth of the nodular calcic horizon and on the molecular weathering ratios of the main oxides.<\/p>\n\n\n\n

The Mar\u00edlia Formation, which crops out in the eastern portion of the Bauru Basin (S\u00e3o Paulo State, southeastern Brazil), usually contains profiles of calcic paleosols developed over sandstone deposits which formed in a eolian sand sheet paleoenvironment. The type of calcium carbonate accumulation in paleosol horizons varies from thin discontinuous coatings on ped surfaces trough faint filaments in soil matrix to massive accumulations between coalesced nodules, which are associated respectively to the stages I, II, and III of calcic soil development morphology classification.<\/p>\n\n\n\n

Four carbonate paleosol profiles with prominent calcic horizons (Bk and Ck) and secondary argillic horizons (Bt and Btk) have been studied in Mar\u00edlia Formation: two near the homonymous city and other two around the Monte Alto plateau. Field data and petrographic, geochemical, and clay mineralogy analyses allowed to classify these four paleosol profiles as Aridisols and define some paleoclimate considerations on their development.<\/p>\n\n\n\n

Molecular weathering ratios relative to calcification, hydrolysis, clay formation, salinization, and hydration of the paleosol profiles has been calculated to define the characteristic of the paleosols and the paleoclimatic proxies. Paleoprecipitations have been estimated by the application of an empirical equation that related this value to the depth of the Bk horizon.<\/div>\n<\/blockquote>\n\n\n\n

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KRUK, N. S. ; VENDRAME, I. F. ; CHAN, C. S. ; LADEIRA, F. S. B. An\u00e1lise de Sensibilidade do Modelo Hidrol\u00f3gico Distribu\u00eddo DHSVM aos Par\u00e2metros de Vegeta\u00e7\u00e3o<\/span><\/strong>. Revista Brasileira de Recursos <\/strong>H\u00eddricos, v. 14, p. 75-84, 2009. <\/p>\n\n\n\n

\"\" ARTIGO<\/a><\/strong> ABSTRACT<\/strong><\/span>

O modelo Distributed Hydrology Soil Vegetation Model (DHSVM) foi aplicado \u00e0 bacia do Rio Bocaina, localizada na Serra do Mar no Estado de S\u00e3o Paulo. A modelagem hidrol\u00f3gica da regi\u00e3o da Serra do Mar apresenta uma grande import\u00e2ncia estrat\u00e9gica tanto na quest\u00e3o econ\u00f4mica, por ligar importantes cidades ao Oceano Atl\u00e2ntico, quanto na quest\u00e3o ambiental, por abrigar os remanescentes de Mata Atl\u00e2ntica. Por ser um modelo fisicamente baseado e distribu\u00eddo, o modelo DHSVM demanda uma grande quantidade de par\u00e2metros f\u00edsicos. Conhecer a sensibilidade das respostas hidrol\u00f3gicas aos par\u00e2metros \u00e9 de fundamental import\u00e2ncia para direcionar pesquisas de campo e tamb\u00e9m para selecionar par\u00e2metros para futuras calibra\u00e7\u00f5es. Este trabalho sugere um conjunto de par\u00e2metros necess\u00e1rios para a execu\u00e7\u00e3o do modelo DHSVM para as classes de vegeta\u00e7\u00e3o de pastagem e da Mata Atl\u00e2ntica. Dentre os par\u00e2metros de vegeta\u00e7\u00e3o, os resultados demonstram que o modelo apresentou-se mais sens\u00edvel \u00e0 varia\u00e7\u00e3o do d\u00e9ficit de press\u00e3o de vapor, da resist\u00eancia estomatal m\u00ednima, do \u00edndice de \u00e1rea foliar e da altura da vegeta\u00e7\u00e3o. <\/div>\n\n\n\n

Palavra-chave: Modelo DHSVM; par\u00e2metros de vegeta\u00e7\u00e3o, DHSVM.  <\/p>\n<\/blockquote>\n\n\n\n

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\"\" 2008<\/p>\n\n\n\n

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LADEIRA, F. S. B.; BASILICI. G. ; DALBO, P. F. F. ; BROLESI, M. F. Paleossolos da Forma\u00e7\u00e3o Mar\u00edlia: contribui\u00e7\u00e3o \u00e0 reconstitui\u00e7\u00e3o paleogeogr\u00e1fica cret\u00e1cica na por\u00e7\u00e3o norte da Bacia Sedimentar do Paran\u00e1 – (Quirin\u00f3plois e Itaj\u00e1-GO)<\/span><\/strong>. Geografia. Ensino & Pesquisa<\/strong>, v. 12, p. 4807-4818, 2008<\/p>\n\n\n\n

\"\" <\/span>ARTIGO<\/a><\/strong> RESUMO<\/strong><\/span>

<\/span> A Forma\u00e7\u00e3o Mar\u00edlia, que apresenta dep\u00f3sitos correlatos nos estados de S\u00e3o Paulo, Paran\u00e1, Mato Grosso do Sul, Minas Gerais e Goi\u00e1s, caracteriza-se por apresentar rochas aren\u00edticas, com presen\u00e7a de carbonato de c\u00e1lcio (CaCO3). Foram realizadas descri\u00e7\u00f5es macrosc\u00f3picas de perfis de paleossolo da Forma\u00e7\u00e3o Mar\u00edlia, nas \u00e1reas de Quirin\u00f3polis e Itaj\u00e1 (GO), onde foi observada a exist\u00eancia predominante de rizoconcre\u00e7\u00f5es preenchidas por calcita, horizontes petroc\u00e1lcico, n\u00f3dulos carbon\u00e1ticos indicando condi\u00e7\u00f5es secas onde foram formados, majoritariamente, entretanto a presen\u00e7a de Vertissolos C\u00e1lcicos e horizontes B texturais indicam que ocasionalmente ocorriam condi\u00e7\u00f5es de maior umidade no solo, eventualmente com a manuten\u00e7\u00e3o do clima \u00e1rido\/semi-\u00e1rido no caso dos Vertissolos (associado a condi\u00e7\u00f5es de depress\u00f5es topogr\u00e1ficas) ou a condi\u00e7\u00f5es atmosf\u00e9ricas mais \u00famidas, no caso de horizontes B texturais. <\/div><\/span><\/p>\n\n\n\n

Palavras-chaves: paleossolo, Forma\u00e7\u00e3o Mar\u00edlia, Goi\u00e1s<\/p>\n<\/blockquote>\n\n\n\n

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\"\" 2006<\/p>\n\n\n\n

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DAL’B\u00d3, P. F. F.; LADEIRA, F. S. B. Ambientes paleoclim\u00e1ticos da Forma\u00e7\u00e3o Mar\u00edlia baseado em an\u00e1lise paleopedol\u00f3gica na regi\u00e3o de Monte Alto (SP)<\/strong><\/span>. Geoci\u00eancias<\/strong>, v. 25, n. 1, p. 127-134, 2006.<\/p>\n\n\n\n

\"\" <\/span>ARTIGO<\/a> <\/strong>RESUMO<\/strong><\/span>

<\/span>A Forma\u00e7\u00e3o Mar\u00edlia (Neocret\u00e1ceo), ocupa o topo da coluna litoestratigr\u00e1fica do Grupo Bauru (Ks). Com espessura m\u00e1xima preservada no estado de S\u00e3o Paulo da ordem de 233 metros na cidade de Lup\u00e9rcio, ocorre extensivamente na parte leste do Planalto Ocidental Paulista, destacando-se em altos topogr\u00e1ficos como o planalto de Echapor\u00e3 e o planalto de Monte Alto. Constitu\u00edda por arenitos grossos a conglomer\u00e1ticos, carbon\u00e1ticos, maci\u00e7os, de colora\u00e7\u00e3o amarelo-esbranqui\u00e7ada, essa unidade seria o registro da contribui\u00e7\u00e3o dos sistemas de leques aluviais vindos de norte\/nordeste, sob imperativo de um clima semi-\u00e1rido em \u00e9pocas maastrichtianas. A an\u00e1lise e descri\u00e7\u00e3o dos paleossolos inseridos nas seq\u00fc\u00eancias sedimentares dessa unidade no munic\u00edpio paulista de Monte Alto visam contribuir para um melhor entendimento das condi\u00e7\u00f5es paleoclim\u00e1ticas vigentes \u00e0 \u00e9poca de forma\u00e7\u00e3o e evolu\u00e7\u00e3o desses perfis de paleossolos. <\/div><\/span><\/p>\n\n\n\n

Palavras-chaves: Grupo Bauru, Forma\u00e7\u00e3o Mar\u00edlia, paleossolos, ambientes paleoclim\u00e1ticos.<\/p>\n<\/blockquote>\n\n\n\n

<\/p>\n<\/div><\/div>\n\n\n\n

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SANTOS, M. dos; LADEIRA, F. S. B. Tectonismos em perfis de altera\u00e7\u00e3o da Serra de Itaqueri (SP): an\u00e1lise atrav\u00e9s de indicadores cinem\u00e1ticos de falhas<\/strong>.<\/span> S\u00e3o Paulo, UNESP, Geoci\u00eancias<\/strong>, v. 25, n. 1, p. 135-149, 2006.<\/p>\n\n\n\n

\"\" <\/span>ARTIGO<\/a> <\/strong> RESUMO<\/strong><\/span>

A Forma\u00e7\u00e3o Itaqueri, terci\u00e1ria, est\u00e1 localizada na serra hom\u00f4nima no Sudeste do Brasil, sendo constitu\u00edda por sedimentos depositados em ambientes de leques aluviais sob condi\u00e7\u00f5es semi-\u00e1ridas. Este estudo envolveu reconhecimento e an\u00e1lise de paleossolos e de fei\u00e7\u00f5es tect\u00f4nicas presentes, bem como suas inter-rela\u00e7\u00f5es. As fei\u00e7\u00f5es morfotect\u00f4nicas e paleopedol\u00f3gicas caracterizam uma evolu\u00e7\u00e3o cenoz\u00f3ica complexa, envolvendo mudan\u00e7as clim\u00e1ticas significativas, diferentes pulsos de movimenta\u00e7\u00e3o tect\u00f4nica e eventos deposicionais distintos. Movimenta\u00e7\u00f5es tect\u00f4nicas cenoz\u00f3icas soergueram e abateram a \u00e1rea sucessivamente, implicando invers\u00e3o de relevo, destrui\u00e7\u00e3o parcial dos sedimentos e dos paleossolos e desnivelamento de blocos. Tais movimenta\u00e7\u00f5es s\u00e3o respons\u00e1veis pelo fato de que os perfis later\u00edticos apresentam-se completos em alguns locais e em outros, profundamente erodidos ou mesmo ausentes. A an\u00e1lise das falhas e de seus respectivos indicadores cinem\u00e1ticos nos perfis later\u00edticos indicam dois pulsos distintos de movimenta\u00e7\u00e3o tect\u00f4nica distensiva: um pulso com \u03c31 NE subvertical, \u03c33 NW suborizontal e \u03c32 NE suborizontal, e outro pulso com \u03c31 NW subvertical, \u03c33 NE suborizontal e \u03c32 NW suborizontal. Tal movimenta\u00e7\u00e3o pode estar relacionada \u00e0 atividade neotect\u00f4nica regional de car\u00e1ter transcorrente, gerando, na \u00e1rea, zonas de falhas distensivas predominantemente NE e NW ao longo de lineamentos preexistentes.<\/div><\/span><\/p>\n\n\n\n

Palavras-chaves: Neotect\u00f4nica, Forma\u00e7\u00e3o Itaqueri, paleossolo, Terci\u00e1rio, paleotens\u00e3o.<\/p>\n<\/blockquote>\n\n\n\n

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\"\" 2005<\/p>\n\n\n\n

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LADEIRA, F. S. B.; SANTOS, M. dos. O uso de paleossolos e perfis de altera\u00e7\u00e3o para a identifica\u00e7\u00e3o e an\u00e1lise de superf\u00edcies geom\u00f3rficas regionais: o caso da Serra de Itaqueri (SP)<\/strong>.<\/span> Revista Brasileira de Geomorfologia<\/strong>, v. 6, n. 2, p. 03-20, 2005.<\/p>\n\n\n\n

\"\" <\/span>ARTIGO<\/a> <\/strong> RESUMO<\/strong><\/span>

<\/span>Tradicionalmente, perfis de altera\u00e7\u00e3o foram empregados de maneira indistinta como evid\u00eancia de superf\u00edcies geom\u00f3rficas de dimens\u00f5es regionais, fatoatualmente questionado por diversos autores. Este trabalho discute as possibilidades e limita\u00e7\u00f5es deste procedimento utilizando-se de um exemplo correspondente aos materiais relacion\u00e1veis com a Forma\u00e7\u00e3o Itaqueri sobre a Serra de Itaqueri, nos munic\u00edpios de S\u00e3o Pedro, Itirapina e Charqueada, no Estado de S\u00e3o Paulo. A Forma\u00e7\u00e3o Itaqueri, de idade cenoz\u00f3ica, \u00e9 composta por sedimentos depositados em ambientes de leques aluviais sob condi\u00e7\u00f5es semi-\u00e1ridas. As fei\u00e7\u00f5es morfotect\u00f4nicas e paleopedol\u00f3gicas remanescentes na \u00e1rea caracterizam uma evolu\u00e7\u00e3o complexa, envolvendo mudan\u00e7as clim\u00e1ticas significativas, pulsos de movimenta\u00e7\u00e3o tect\u00f4nica distintos e diferentes eventos deposicionais. A an\u00e1lise dos sedimentos e dos paleossolos indica dois eventos deposicionais em ambiente de leques aluviais alternados por per\u00edodos de clima mais \u00famido em que se desenvolveram dois perfis de altera\u00e7\u00e3o associados a distintas superf\u00edcies; o primeiro, um solo espesso, desenvolvido nos sedimentos associados ao primeiro evento deposicional, sendo atingido posteriormente por um processo de silicifica\u00e7\u00e3o; o segundo, um perfil later\u00edtico muito espesso, desenvolvido nos sedimentos associados ao segundo evento deposicional. Uma superf\u00edcie erosiva bem marcada separa ambos materiais. Desta forma existem 3 superf\u00edcies geom\u00f3rficas bem marcadas na \u00e1rea: uma associada \u00e0 base dos dep\u00f3sitos da Forma\u00e7\u00e3o Itaqueri que trunca as forma\u00e7\u00f5es Botucatu e Serra Geral; outra associada ao desenvolvimento de espessos solos que foram silicificados, e outra associada ao desenvolvimento de um perfil later\u00edtico, associada a um espesso ferricrete. Movimenta\u00e7\u00f5es tect\u00f4nicas cenoz\u00f3icas soergueram e abateram a \u00e1rea sucessivamente, implicando invers\u00e3o de relevo, destrui\u00e7\u00e3o parcial dos sedimentos e dos paleossolos e posicionamento altim\u00e9trico diferenciado ao longo da \u00e1rea.<\/div><\/span><\/p>\n\n\n\n

Palavras-chaves: Superf\u00edcie geom\u00f3rfica; Paleossolo; Forma\u00e7\u00e3o Itaqueri.<\/p>\n<\/blockquote>\n<\/div><\/div>\n\n\n\n

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\"\" 2001<\/p>\n\n\n\n

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COELHO, M. R.; VIDAL-TORRADO, P.; LADEIRA, F. S. B. Macro e micromorfologia de ferricretes nodulares desenvolvidos de arenito do Grupo Bauru, Forma\u00e7\u00e3o Adamantina<\/strong>.<\/span> Revista Brasileira de Ci\u00eancia do Solo,<\/strong> Vi\u00e7osa, v. 25, n.2, p. 371-385, 2001.<\/p>\n\n\n\n

\"\" ARTIGO<\/a> <\/strong> RESUMO<\/strong><\/span>

Nas paisagens do norte do estado de S\u00e3o Paulo, sob dom\u00ednio do Planalto Ocidental, ferricretes ocorrem em diferentes n\u00edveis topogr\u00e1ficos e, apesar de pouco documentados, constituem fei\u00e7\u00f5es que se repetem com freq\u00fc\u00eancia sobre os arenitos cret\u00e1cicos do Grupo Bauru, Forma\u00e7\u00e3o Adamantina. Realizou-se um estudo morfol\u00f3gico, em diferentes escalas de observa\u00e7\u00e3o, a fim de elucidar a g\u00eanese desses ferricretes (plintita e petroplintita) encontrados no ter\u00e7o inferior de uma vertente dominada por solos com B textural. A \u00e1rea estudada localiza-se na Esta\u00e7\u00e3o Experimental de Agronomia de Pindorama, do Instituto Agron\u00f4mico de Campinas (IAC), regi\u00e3o norte do estado de S\u00e3o Paulo. Dois perfis foram selecionados para a descri\u00e7\u00e3o morfol\u00f3gica detalhada e para as observa\u00e7\u00f5es micromorfol\u00f3gicas com lupa binocular e microsc\u00f3pio petrogr\u00e1fico. As evid\u00eancias macro e micromorfol\u00f3gicas dos ferricretes revelam uma origem associada \u00e0 lixivia\u00e7\u00e3o do ferro ferroso a montante da paisagem e reprecipita\u00e7\u00e3o na zona de vadosa. Esses ferricretes apresentaram diferentes f\u00e1bricas internas, a maioria dos quais com estruturas de degrada\u00e7\u00e3o, evidenciando o desmantelamento atual da coura\u00e7a. As diferen\u00e7as nas f\u00e1bricas internas est\u00e3o relacionadas com a distribui\u00e7\u00e3o do esqueleto e do plasma: alguns apresentam esqueleto bem selecionado, com predomin\u00e2ncia de areia muito fina, enquanto em outros predomina a areia m\u00e9dia; outros, ainda, mostram esqueleto pouco selecionado, assemelhando-se ao fundo matricial interglebular; a maioria mostra alguns volumes ocupados apenas por plasma. Demonstra-se que fatores pedo-lito-biol\u00f3gicos est\u00e3o envolvidos nessa diversidade entre ferricretes de um mesmo horizonte, formando in situ gl\u00e9bulas t\u00e3o distintas em suas f\u00e1bricas, que podem ser erroneamente interpretadas como provenientes de diferentes locais da paisagem, transportadas e depositadas nas baixas encostas durante a g\u00eanese dos ferricretes.<\/div>\n<\/blockquote>\n<\/div><\/div>\n\n\n\n
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<Voltar<\/a> | \u00cdndice<\/span>

<\/strong><\/p>\n\n\n\n

\"\" Artigos Cient\u00edficos<\/strong><\/a><\/p>\n\n\n\n

\"\" Teses de Doutorado<\/a><\/strong><\/p>\n\n\n\n

\"\" Disserta\u00e7\u00f5es de Mestrado<\/a><\/strong><\/p>\n\n\n\n

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2026 2025 2024 Douglas Silva Cabral; Francisco Sergio Bernardes Ladeira. Caracteriza\u00e7\u00e3o pedol\u00f3gica de duas vertentes na bacia do Rio Gurutuba, em Ita\u00f3ca, SP. Revista Brasileira de Geografia F\u00edsica v.17, n.03(2024) 1543-1559. ARTIGO Palavras-chave: Pedologia; Solos; Suscetibilidade; Deslizamentos Pedro Michelutti Cheliz; Francisco Sergio Bernardes Ladeira; Jo\u00e3o Carlos Moreno de Sousa; Juliana Alves Rodrigues; Paulo C\u00e9sar Fonseca […]<\/p>\n","protected":false},"author":127,"featured_media":0,"parent":215,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"ngg_post_thumbnail":0,"footnotes":""},"class_list":["post-358","page","type-page","status-publish","hentry","post"],"yoast_head":"\nArtigos cient\u00edficos - LABPED<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ige.unicamp.br\/pedologia\/publicacoes\/artigos-cientificos\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Artigos cient\u00edficos - LABPED\" \/>\n<meta property=\"og:description\" content=\"2026 2025 2024 Douglas Silva Cabral; Francisco Sergio Bernardes Ladeira. Caracteriza\u00e7\u00e3o pedol\u00f3gica de duas vertentes na bacia do Rio Gurutuba, em Ita\u00f3ca, SP. Revista Brasileira de Geografia F\u00edsica v.17, n.03(2024) 1543-1559. 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