Signification paléoécologique et paléogéographique des bivalves du Carbonifère inférieur du bassin d’Ancenis (Massif armoricain)


fr Comptes Rendus Palevol 4 (1-2) - Pages 109-121

Published on 28 February 2005

This article is a part of the thematic issue Fauna and flora of paralic basins

Palaeoecological and palaeogeographical inferences from Early Carboniferous bivalves of the Ancenis Basin (Variscan belt, France)

In the basal part of the Ancenis Formation, of Dinantian age, greenish to purple mudstones display a few bivalves, assigned to the genera Lithophaga, Modiolus, and Naiadites. Because Naiadites is considered to be a non-marine bivalve, and is only previously reported in Scotland in Dinantian rocks, a brackish environment can be assumed for the Ancenis Basin during the Early Carboniferous.


Ancenis Basin, bivalves, paralic, Lower Carboniferous, variscan palaeogeography, France

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