Typologie des assemblages d’ostréidés (Bivalvia) et interprétations paléoenvironnementales

Blaise VIDET

fr Comptes Rendus Palevol 6 (1-2) - Pages 47-58

Published on 28 February 2007

This article is a part of the thematic issue Fossil bioaccumulations and bioconstructions

Typology of oyster shellbeds and palaeoenvironmental interpretations

Fossil oyster assemblages have a great diversity of geometries. Their accumulations can be tridimensional (shell bed), within a strata, or bidimensional, on a strata surface (hardground). A taphonomic analysis can be used to discriminate these assemblages according to the way in which time has been recorded in sedimentary sequences. This preliminary analysis conditions palaeoenvironmental interpretations. Thus, a typology of the various existing assemblages is proposed according to several examples of shellbeds of the Upper Cretaceous of the North-Aquitaine basin (SW France) and the Upper Neogene of Andalucía (SE Spain).


Taphonomy, time-averaging, condensation, Shellbeds, oysters, palaeoenvironmental reconstructions

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