摘要：The Pyrenees is proving to be a key-area to analyse many of the sedimentary and biotic changes that marked the early Paleogene evolution of warm (sub) tropical marine environments. During that time, this alpine chain formed a large intra-plate marine embayment opening towards the north Atlantic (the so-called Pyrenean basin), with a deep central depression surrounded by broad shallow-water marginal shelves on the south, east and northern sides. In the shallow areas, sedimentation was defined by carbonate platforms developing a whole range of sub-environments (beaches, tidal flats, lagoons, bioclastic accumulations and reefs), whereas (hemi)pelagic deposits (“Scaglia like” limestone-marl alternations) with shelf-derived breccias and turbidites characterised the slope and basin domains. The remnants of both shallow and deep water successions crop out extensively along the western and south-central Pyrenees, allowing detailed sedimentological and biostratigraphic analyses and the accurate reconstruction of platform-basin sections
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