Geomorphology of the São Pedro ridge and Lower Piracicaba River region, southeastern Brazil

Abstract

This work presents a new geomorphological map (1:50,000) of the São Pedro region in southeastern Brazil. It incorporates new information about landform development and updates the classical legend of the Recherche Coopérative Sur Programme 77 that supported the previous map drawn in 1978. According to the new map and associated papers, tectonic structures have controlled the orientation of the streams that have dissected the regional landforms, especially during wetter periods. Under dry conditions, the planing process caused faster escarpment retreat of the São Pedro ridge and gave rise to a glacis and its Pleistocene colluvial sandy cover. The escarpment, glacis, and other regions were dissected during subsequent wet periods, forming the upper Quaternary main fluvial terraced levels of the Piracicaba and Tietê rivers. Finally, this geomorphological arrangement was disturbed by the reactivation of old structures in the current tectonic environment.

Análise integrada da paisagem: perfis geoecológicos na transição Planalto Ocidental - Depressão Periférica no município de São Pedro, estado de São Paulo

“…Foram identificadas quatro unidades, que correspondem a arranjos homogêneos do ponto de vista da constituição, organização e funcionamento dos elementos: I) Planalto Ocidental, II) Escarpa de Cuesta, III) Depressão Periférica -Glacis Preservado, IV) Depressão Periférica-Glacis Dissecado. Esta divisão coincide com a proposta de compartimentação geomorfológica indicada por PINHEIRO & QUEIROZ NETO (2016), devido, em grande parte, à escala de abordagem e às influências morfoestruturais e morfoesculturais locais.…”

Aloformação Andradina: expressão do Antropoceno no Planalto Ocidental Paulista

“…Outras observações de ocorrências são relatadas na literatura, porém sempre de ocorrência restrita e descontínua ao longo dos eixos dos grandes cursos d'água como os terraços no Vale do Rio do Peixe mapeados por ETCHEBEHERE et al (1999), com evidências de neotectônica. Podem também ser citadas pesquisas sobre depósitos arenosos neocenozoicos que capeiam arenitos da Formação Pirambóia na transição do Planalto Ocidental para a Depressão Periférica Paulista na região de São Pedro (MELLO et al 2001, PINHEIRO 2014, PINHEIRO & QUEIROZ NETO 2016.…”

Geochronological and paleoenvironmental reconstruction of colluvial deposits in a cuesta landscape in south‐eastern Brazil

“…Studies have documented cuesta evolution in different parts of the world based on the absolute dating of Quaternary deposits associated with the landscape (e.g. Schmidt, 1989; Brookes, 1993; Gutiérrez Elorza and Martínez, 2001; Roqué et al ., 2013; Gutiérrez et al ., 2015; Pinheiro and de Queiroz Neto, 2016; Sheehan and Ward, 2018). In Brazil, the application of modern geochronological techniques to reconstruct the denudational processes that sculpt cuestas is still limited.…”

“…(B) Spatial distribution of the Paraná Basin and the basaltic rocks of the Serra Geral Formation in the state of São Paulo. Hatched boxes indicate the locations of the sectors investigated by Penteado (1968), Pinheiro and de Queiroz Neto (2016) and the study area. (C) Digital elevation model of the study area and sample locations.…”

“…In addition, some studies have considered the influence of tectonic (or neotectonic) deformations on the geomorphic evolution of cuesta landforms along the Serra Geral (e.g. Penteado, 1968; Facincani, 2000; Pinheiro and de Queiroz Neto, 2016, 2017; Pinheiro et al ., 2019). Among them, the pioneering research of Penteado (1968) suggested the possible role of tectonics in the origin and evolution of cuesta landscapes in a sector of the state of São Paulo (Fig.…”