The Montagne Noire Frasnian (Upper Devonian) Conodont Succession

The Frasnian conodont sequence developed at twelve sections in the Montagne Noire, southwestern France is divisible into thirteen conventional zones, all characterized by abundant and well preserved elements of the Palmatolepis biofacies. This contrasts with the seven-fold subdivision of the standard zonation of the Frasnian. Bases of zones are defined by species of Palmatolepis (in 8 instances), Ancyrodella (in 3), Ancyrognathus (1), and...