Abstract
The Sierra de Port del Comte and the Sierra del Cadi consist of Paleogene (Paleocene to middle Eocene) neritic carbonates which record the evolution of the Eastern South Pyrenean foreland basin. Based on facies interpretation and on biostratigraphic data (Al-veolina, Nummulites, Assilina and planktonic foraminiferal zones) 7 depositional sequences can be differentiated. The Navarri Sequence (Thanetian), the Ager Sequence (late Thanetian-middle Ilerdian), the Llimiana Sequence (middle Ilerdian), the Odén Sequence (late Ilerdian-middle Cuisian), the Cadi Sequence (middle Cuisian) and the Bagá-Josa Sequence (late Cuisian-early Lutetian). These sequences reflect global changes of the sea-level. The structural evolution of the analyzed time interval is characterized by low tectonic activity during the Paleocene, increased rates of subsidence during the early Eocene and the incorporation into overthrusting of the South Pyrenean nappes during the middle Eocene.
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