New micropalaeontological studies on the type section of the Campanian-Maastrichtian at Tercis (SW France): new ostracodes obtained using acetolysis

Bernard Andreu (1) , Gilles Serge Odin (2)

1 LMTG - Laboratoire des Mécanismes et Transfert en Géologie
2 Unité de Géochronologie et Sédimentologie Océanique

Through the use of acetolysis new micropalaeontological studies on the type section of the Campanian-Maastrichtian boundary at Tercis (SW France) we obtained additional information on ostracodes. Acetolysis on hard carbonates levels of the Tercis quarry found 22 species in addition to those of the studies published in 2001. Today, 75 species are recognized: they represent 34 known genera, and 4 currently unidentified. Small species usually rare of the genera Aversovalva, Bythoceratina and Eucytherura were collected. All of the assemblages (of both genera and species) are characteristic of a Campanian-Maastrichtian open carbonate platform environment.

Mots clés: Ostracodes; Campanian; Maastrichtian; stratotype; Tercis; Aquitaine; France; acetolysis

Domaines: Paléontologie; Stratigraphie

Bernard Andreu, Gilles Serge Odin. New micropalaeontological studies on the type section of the Campanian-Maastrichtian at Tercis (SW France): new ostracodes obtained using acetolysis. Carnets de Géologie / Notebooks on Geology, 2008, CG2008 (A02), pp.1-14. ⟨hal-00235838v2⟩