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2.2.6. X Formation - WEL

Authors: Coen-Aubert, 1991a.
Description: Lenticular limestone bodies consisting of bedded or massif crinoidal limestones, occasionally argillaceous or dolomitic and including parts with abundant corals and stromatoporoids.
Reference section: Wellin, Fond des Vaux about 1 km north of the village church.
Area: Locally on the southern flank of the Dinant Synclinorium at Wellin and? Nismes.
Thickness: About 120m at Wellin and 115m at Nismes.
Age: Late Eifelian-? early Givetian; ensensis-? hemiansatus condodont Zones (Bultynck et al., 2000).