Sobre la edad de los conglomerados basales de la transgresión del Senoniense en la parte más interna de la cuenca sudpirenaica catalana (NE de España)

Abstract

About the age of the basal conglomerates of the Senonian transgression in the proximal part of the South Pyrenean Basin (Catalonia, Spain)

In the South Pyrenean marginal ranges (Sierras marginales) of Catalonia, at the base of the Senonian transgression, there is a formation of quartz sands and gravels (cf Adraén facies) of controversial age, especially in the outcrops corresponding at the proximal paleogeographic zone.
The chronostratigraphic discussions concerning 14 localities are exposed. The age of these facies in a new locality is analysed. The hypothesis that the Adraén facies is a diachronic formation from NW to SE is confirmed. Its age goes from Upper Santonian to Lower Maastrichtian times.