Análisis sedimentológico e interpretación ambiental de una Formación de Rudistas (Santoniense, Zona Surpirenaica).

Abstract

The Santonian series of Collades de Basturs, in the South-Central Pyrenees, consist mainly of calcareous shelf margin sediments and associated rudist formations. de Paleontología, Universitat Autónoma de Barcelona. Departament * 979 In this area, rudists are the most important factor of the carbonate sedimentation and the morphologic features of the organic buildups are related to the composition of the different communities and the local environmental conditions. Although the aggregative forms are responsible for ah the building, the biogenetic debris constitutes the larger amount of accumulated material. This study suggest that these organisms contributed to develop a carbonate-shelf margin that displays a transgresive sedimentological evolution.