Intérêts environnemental et chronologique des bioaccumulations à brachiopodes. Exemple de l’Oxfordien supérieur (Jurassique supérieur) du Bassin parisien (France)

Philippe COURVILLE, Catherine CRÔNIER, Pierre-Yves COLLIN, Camille BLOSSE & Sébastien LORIN

fr Comptes Rendus Palevol 6 (1-2) - Pages 87-101

Published on 28 February 2007

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

Environmental and chronological interests of the brachiopod bioaccumulations. Example of the Upper Oxfordian (Upper Jurassic) of the Paris Basin (France)

In the Upper Jurassic of the eastern Paris Basin, brachiopods can be preserved in abundance in particularly thin levels. The apparent biodiversity is poor in such lithological units, which appear with rhythmicity throughout the series. However, the observed morphological changes within the dominant taxa (terebratulids, analyzed through morphometrical methods) traduce the palaeoenvironmental changes (deepness). Moreover, each unit showing such a brachiopod concentration characterizes a very short time slice (shorter than any ammonite bio-horizon); so, it provides an alternative, more powerful than the ammonites, for correlations. Unfortunately, they cannot be useful for large-scale correlations, due to their kilometrical geographical range.


Upper Jurassic, Oxfordian, Paris Basin, France, Brachiopoda, morphometry

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