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A detailed sedimentological and paleontological study of the Late Santonian-Late Campanian carbonate platform deposits of the Serres Marginals area (South margin of the Pyrenean Basin) has been performed. Three depositional shallow carbonate sequences have been distinguished (CI, C2 and C3). Within the shallow platform sequences moderate energy subtidal to intertidal, high energy sand-shoal, protected lagoon and restricted lagoon to lacustrine fades have been identified.

Abstract:The Font de les Bagasses marls and marly limestones (Montsec Mountains, NE Spain) host a rich assemblage of larger foraminifera, that was described for the first time in the early 20th Century from the currently submerged locality of Tragó de Noguera (Marginal Mountains). In this paper, a detailed architectural study has been carried out on selected, agglutinated larger foraminifera, which include Choffatella aff. rugoretis GENDROT, Hemicyclammina chalmasi (SCHLUMBERGER), Cuneolina conica ORBIGNY, Cuneolina cylindrica HENSON, and Dictyopsella kiliani MUNIER-CHALMAS. Moreover, it presents their biostratigraphic range and the range of the associated porcellaneous and lamellar-perforate for aminifera in the study area. The assemblage is Early Campanian in age.