SUBMARINE RESEDIMENTATION OF CRETACEOUS DEPOSITS DURING THE PALEOGENE- THE FORMATION GRESO-GLAUCONIEUSE FROM THE ULTRAHELVETIC PREALPS (HAUTE-SAVOIE, FRANCE)

The ''Formation greso-glauconieuse'' (Ultrahelvetic Prealps, Haute-Sav oie, France) was previously attributed to the Aptian - Albian on the b asis of rare nannofossils and cephalopod fragments. However, in this s tudy, several samples yielded residual assemblages containing spinose globigerinids that suggest a middle Eocene age (P9-P12 planktonic fora miniferal zones) for this formation. Sedimentological analysis reveale d the occurrence of slump and bottom-current deposits within the ''For mation greso-glauconieuse'' Our results provide new insight into the p alaeogeography and the palaeoceanography of the northern Alpine margin during the Palaeogene and emphasize the importance of reworking proce sses in fine-grained sedimentation.