Nouveaux repères biostratigraphiques à terebratulidés (Brachiopodes) dans le Tithonien inférieur ouest-européen |
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Authors: | Pierre Hantzpergue Annick Boullier Dominique Abit |
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Affiliation: | a UFR des sciences de la terre, UMR 5125 du CNRS, université Claude-Bernard-Lyon-I, 43, boulevard du 11-Novembre, 69622 Villeurbanne cedex, France b Département de géosciences, université de Franche-Comté, 16, route de Gray, 25030 Besançon cedex, France c 3, impasse des Biroulayres, 33610 Cestas, France d Route des Huttes, 17650 Saint-Denis-d'Oléron, France |
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Abstract: | The discovery of a new species of Terebratulid (Xestosina sera nov. sp.) in the Lower Tithonian allows to specify the biostratigraphical subdivision of the Gigas Zone. This also allows to improve the correlations, when ammonites are lacking, among the Tithonian deposits of Aquitaine, the northern Jura and the eastern border of the Paris Basin. The critical revision of the Xestosina genus gives a nomenclatural setting argued to the index-species of biozones. It constitutes a brachiopods based parallel scale for the Kimmeridgian and Tithonian Stages. |
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Keywords: | Brachiopodes Terebratulidé s Biostratigraphie Tithonien France |
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