Abstract

RESUME The la te Pleistocene - Holocene sedimentary cover of the continental shelf is composed of : a) coarse materials of the continental environment reworked by the Flandrian transgression; b) muddy sediments of the deeper environment with decreased deposi­ tional dynamics; and c) discontinuously layered materials supplied by the« fiumare ». At present, a nearshore sand prism is followed up to the shelf edge by a modern mud blanket which almost completely buries the relict sand of the transgression. Th~ conti­ nental slope is strongly affected by geologically very recent or currently active mass gravity movements. Besides isolated slump zones, two large slump/mud flow com­ plexes which have been surveyed may probably be related to mechanisms involving the tectonic instability of the study area and an overloading of the shelf edge during the last glacial maximum.

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