El Neógeno del Empordà y Baix Ebre (CAtalunya): estudio comparativo

J. FLETA, A. ARASA TULIESA, J. ESCUER

Abstract


The Neogene infill of the Empordà and Baix Ebre basins was undifferentiated up to now. In Empordhthere are five sedimentary systems and in Baix Ebre six lithostratigraphic units are distinguished. In the Empordà, Esponellà conglomerates are continental diposits of Upper Miocene (Turolian) and coastal sediments are Tortonian (GEOT-1 borehole). Pliocene sedimentation shows a similarity in both basins. In the Empordà basin deltaic (Avinyonet, Vilamalla, etc.) and bay environments (Siurana marls) are dominant, while littoral (Lower Marine Detrital Unit) and bay (Campredó marls) environrnents appear in the Baix Ebre. The Pliocene series culminate withlacustrine-aliuvial facies (Sant Onofre limestone and Roca Corba conglomerate units) in the Baix Ebre basin and with alluvial facies (Sant Climent-Perelada and Cistelia systems) in the Empordà basin. We propose a similarity between Siurana and Campredó marls, and we consider it as a guide leve1 in the catalonian marine pliocene.


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