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5.1. Deville Group - Dv

Description: Equivalent of the “Système Devillien” of Dumont (1847). It consists of two formations from base to top: the La Longue-Haie and the Les 4 Fils Aymon Fms. The upper boundary of the Deville Group with the Revin Group is placed by Beugnies (1960) at the top of the Renaissance Mbr (Les 4 Fils Aymon Fm); its lower boundary is not observed.

(M. VANGUESTAINE)