Controles alocíclicos en el relleno sedimentario de una cuenca Paleógena: arquitectura deposicional del Grupo Cornudella, Cuenca del Ebro (Tarragona)

Abstract

The non-marine Cornudella Group (Thanetian-Bartonian) is constituted by different lithostratigraphic units. La Morera Formation is characterized by mudstones deposited in lacustrine and palustrine environments. The Ulldemolins Complex shows a great variety of facies and lithosomes with complex geometrical relationships between them, it corresponds to d is ta l a llu v ia l deposits interfin g e re d w ith m u d flat deposits where some ephemeral evaporitic and limestone-dominated lakes were developed. The basement topographic irregularities control the lateral distribution of the different rock bodies and their complex geometric relationships at the lower part of the Group. The different facies associations allow us to define multiple depositional sequences. The boundaries between sequences suggest different changes of climatic and sedimentary conditions of deposition