Levantamento de ocorrências fósseis nas pedreiras de calcário do Subgrupo Irati no estado de São Paulo, Brasil

Abstract

The main focus of this work was to contribute for the paleontological updating of Irati Subgroup in the state of Sao Paulo, through the searching of extent fossils at active quarries and their comparison to the ones found in literature references. Hence, eighteen active quarries were visited and in all of them many fossils were found. In order to optimize the comparison and distribution of the studied fossils, the data was added to geographic information system (GIS). It was found two new localities of fossil plants in Saltinho and Itapetininga. The most abundant vertebrate fossil found in all visited quarries were mesosauridean bones, new localities were described to Cesario Lange, Pereiras, Saltinho and Tiete. Finally, abundant coquinas composed by shellfish shells were found in Angatuba, Cesario Lange, Itapetininga, Ipeuna, Limeira, Pereiras, Saltinho and Tiete quarries. As well as giant stromatolites in Santa Rosa de Viterbo interbeded with mesosauridean bones. It was also noticed that most of the extraction faces of quarries studied before, and nowadays inactivated, the fossil collect is less productive once the extraction faces found are damaged. However, with the present work the information presented about the active quarry locations and their fossiliferous contents lead to new researches.