The Quaternary stratigraphy of the São Paulo Basin, southeastern Brazil

Detailed sedimentological studies of the university main campus of São Paulo city, Brazil, revealed a significant unconformity at the top of the Cenozoic sedimentary deposits of the São Paulo Formation. This unconformity is overlapped by Quaternary sediments which can be traced in 1:20,000 scale and...

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Bibliographic Details
Published in:Journal of maps 2022, Vol.18 (2), p.190-199
Main Authors: Henrique-Pinto, Renato, Santos, Mauricio G. M.
Format: Article
Language:English
Subjects:
Bosque Formation
Cenozoic
College campuses
Geology
Holocene
Iron
mapping metropolitan areas
Mudflows
Outcrops
Precambrian
Quaternary
Quaternary geology
Rivers
Sediment deposits
sedimentary geology
Sedimentation & deposition
Sediments
Stratigraphy
São Paulo Basin
São Paulo Formation
Terraces
Unconformity
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Summary:Detailed sedimentological studies of the university main campus of São Paulo city, Brazil, revealed a significant unconformity at the top of the Cenozoic sedimentary deposits of the São Paulo Formation. This unconformity is overlapped by Quaternary sediments which can be traced in 1:20,000 scale and are here named as the Bosque Formation. This unit is characterized by poorly sorted mud deposits and very fine-grained red sand with granule- and pebble-sized clasts of the underlying São Paulo Formation. Furthermore, it overlies topographic highs of the Precambrian basement, and is laterally interfingered with fluvial terraces; it is eroded by the modern river at the lower reaches of the outcrops. The Bosque Formation records sedimentation characterized by a widespread mudflow that overlays old alluviums sediments, and was likely deposited during the beginning of the Holocene.
ISSN:1744-5647
1744-5647
DOI:10.1080/17445647.2021.2018367