La Formación Capas Rojas (Cretácico Superior) en el Mencal Subbético Medio, provincia de Granadaprecisiones sedimentológicas y bioestratigráficas

Abstract

The Mencal in the Median Subbetic is an inselberg rising from the lower level of the Guadix-Baza Basin. It has a dome structure made of Early Liassic limestones (Gavilán Fm) that were deposited in a shallow marine platform. In the Mencal stand out some small outcrops of pelagic marly limestones, marls and radiolarites of late ages (Late Liassic-Upper Cretaceous) in contac with the Early Liassic Limestones. All these pelagic facies were deposited on an irregular palaeotopography, but mainly in small elongated depressions linked to faults, with palaeokarstic features in its fault surfaces. The presence of these pelagic facies with different age immediately adjacent to the Gavilán Fm limestones would indicate us a complex sedimentary history with different stages of deposition, erosion and fracturation along the Jurasic and Cretaceous. Among these pelagic facies they are marly limestones with pink and white colors belonging to the Capas Rojas Fm of the Late Cretaceous whose age has been determined with calcareous nannoplankton as Late Campanian. specifically belonging to the Uniplanarius trifidus Zone (NBK20).