Abstract
AbstractThis paper is a contribution to the redefinition of the base of Carboniferous system. At present the criterion for the definition of the Devonian–Carboniferous boundary is the first occurrence of a conodont species. In order to evaluate the stratigraphic potential for new criteria for the definition of the Devonian–Carboniferous boundary, the distribution of conodont species ofBispathodus, Branmehla, Palmatolepis, Polygnathus, Protognathodus, PseudopolygnathusandSiphonodellaacross the boundary is presented and discussed. An updated biozonation scheme across the boundary based on the First Appearance ofBispathodus ac. aculeatus, Bispathodus costatus, Bispathodus ultimus, Protognathodus kockeli, Siphonodella bransoniandSiphonodella duplicatais proposed, and it is suggested that the new criterion for the definition of the base of the Carboniferous system be the First Appearance Datum ofPr. kockeliorSi. bransoni.
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