Les Gastropodes cénomaniens de France et des régions voisines

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Abstract
From the regional and stratigraphical distribution of Cenomanian gastropod faunas in France and the adjoining areas the extent of a tropical and a subtropical realm is deduced. The Lower and Middle Cenomanian faunas were descending from the North American faunas. Until the Upper Cenomanian a cold ocean current prevented the occurrence of Tropical gastropods in the Southeast of France while they occurred in the Aquitaine basin. With the beginning of the Upper Cenomanian a change in the current system leads to a redistribution of faunal realms and Tethyan elelements extend over Southern France and the Paris basin further North.

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