Open AccessGEOLOGIA E PALEONTOLOGIA DO MEMBRO TAQUARAL (EOPERMIANO) NO AFLORAMENTO DO RIO DA CABEÇA, ESTADO DE SÃO PAULO
Author(s) -
Artur Chahud
Publication year - 2020
Publication title -
estudos geológicos
Language(s) - English
Resource type - Journals
ISSN - 1980-8208
DOI - 10.18190/1980-8208/estudosgeologicos.v30n1p19-30
Subject(s) - actinopterygii , geology , geomorphology , geography , humanities , biology , fish <actinopterygii> , art , fishery
The Irati Formation, Permian (Cisuralian) of the Paraná Basin, stands out for important geological and paleontological characteristics. Two members are recognized, Taquaral and Assistência. Most of the Taquaral Member is composed of silty-clayey, gray sediments with plane-parallel laminations and at the base there are conglomeratic sandstones with large numbers of vertebrate fossils. The Cabeça River outcrop has the greatest thickness of the sandy facies, 43cm, the others are 9.5 and 15cm thick, but the lowest fossil density, 0,5fossil/cm². The present work discusses and characterizes the taphonomy and paleoictiofauna of this outcrop. Most fossils are teeth, scales and indeterminate bone parts of Actinopterygii (Palaeonisciformes) and indeterminate Xenacanthiformes teeth.