Revisión de la estratigrafía del Grupo Tremp («Garumniense», Cuenca de Tremp-Graus, Pirineos meridionales)

Abstract

The term Tremp Group reflects more appropriately than the former Tremp Formation the stratigraphic complexity of the so-called «Garumnian» of the south Pyrenean Tremp-Graus basin. However, the current definitions of some of the formal units making up the Tremp Group are somewhat inconsistent. New field observations and, mainly, the discovery of the carbon isotopic excursion of the Initial Eocene Thermal Maximum, permit to correlate key sections of the Tremp Group with far more reliability than was hitherto possible. On the light of that correlation we revise the original definitions of the Talarn, Esplugafreda and Claret Formations, and of some of its members, and propose modifications to clarify their boundaries and ages