Late Givetian to Middle Frasnian ostracods from Nismes (Dinant Synclinorium, Belgium) and their lithological context

About 2,450 carapaces, valves and fragments of ostracods have been extracted from 94 samples collected in the Fromelennes, Nismes and Moulin Liénaux Formations at Nismes, close to Frasnes (southern border of the Dinant Synclinorium, Belgium). Sixty-three taxa belonging to the Eifelian Mega-Assemblage are recognized. The only significant change as deduced from the ostracod fauna is the progressive transition from lagoonal and semi-restricted environments to open-marine environments in the upper part of the Fromelennes Fm. The Polyzygia beckmanni beckmanni Zone and the Favulella lecomptei Zone e... Mehr ...