Portal de Periódicos da CAPES

Artigo Acesso aberto Produção Nacional

BIBTEX RIS

O SUBGRUPO ITARARÉ (PERMOCARBONÍFERO) NA REGIÃO DO MÉDIO TIETÊ, ESTADO DE SÃO PAULO

1992; Sociedade Brasileira de Geologia; Volume: 22; Issue: 3 Linguagem: Inglês

10.25249/0375-7536.1992301310

2177-4382

Setembrino Petri, Fernando A. Pires,

Paleontology and Stratigraphy of Fossils

The sediments of the Permo-Carboniferous Itararé Subgroup of the Tietê river middle valley, State of Sao Paulo, Brazil were studied in outcrops and cores from wells drilled up to 310 m for groundwater, in order to get a general picture of their stratigraphic relationships.The Subgroup in this valley may be subdivided into the Itu and Capivari, testifying a transgressive cycle starting with the non-marine Itu Formation, and followed by the marine Capivari Formation.The marine transgression maximum resulted in the deposits of the Tatui Formation belonging to the Permian Guatá Subgroup.A paleogeographic model is developed for the Capivari Formation in the Tietê river middle valley, on basis of outcrops and eight wells throughly cored down to 310 m.A continuous offshore marine environment occupied the areas located south and west of Capivari and Rafard (SP) towns.Submarine debris flows, coming from northeast, encroached upon this offshore environment in at least two channels, one of them reaching present day urban Capivari.