Reconsideración del límite Oxfordiense-Kimmeridgiense en el perfil de Puerto Lorente (Prebético Externo)

Abstract

In the Puerto Lorente section at the Sierra de Cazorla (External Prebetic), the uppermost Oxfordian is made up of limestones with recognizable traces of increasing condensation. O verlayin gare marls, marly-limestones and limestones of the Lower Kimmeridgian. The surface boundary between the Oxfordian and the Kimmeridgian has been traditionally referred to the cephalopod rich “hardground" which precedes deposition of the lowerm ost Kimmeridgian marls. Nevertheless, careful studies on this surface allowed us to identify rare specimens of Sutneria platynota (REINECKE) and therefore to improve the previous biostratigraphic interpretations. The obtained data will be valuable for the updated interpretation of the eco-sedimentary evolution in epicontinental areas of the Southlberian paleomargin around the Oxfordian-Kimmeridgian boundary