Un nivel de concentracjon de briozoos en el Cuisiense inferior ; de Esdolomada (Formacion Murillo, Valle del Isabena)

Abstract

The presence of a condensation bed, consisting of a dense lumachellic marly limestone with a nearly monospecific bryozoan (Teichopora clayata Gregory) is indicative of a change in tendency from transgressive to regressive within the transgressive interval constituting the Murillo Formation in the Southcentral Pyrenees