Description of the stratotype section and proposal of hypostratotype section of the Lower Cretaceous Quirico formation, Sao Francisco Basin, Brazil

The Quirico Formation presents an abundant and diversified fossil record, and is the only formation from the Cretaceous of the Sao Francisco basin with the occurrence of ostracodes. This formation was described from the banks of the Quirico creek, tributary of the Prata river, which is the type locality. However, a stratotype section was not described. The present work presents the description of the stratotype section of the Quirico Formation and proposal of hypostratotype section, based on the lithologic description and fossiliferous occurrences. The studied sections are located in the Minas Gerais State, Brazil:1. stratotype section of the Quirico Formation, by the banks of Oujda!) and Sao Jose creeks, Presidente Olega do County; 2. hypostratotype section of the Tereza Farm, near the Olhos D'agua community, Joao Pinheiro County.