Abstract
The pentapartite Three Lick Bed separates the Huron Shale Member of the Ohio Shale from the overlying Cleveland Shale Member, which are part of the Upper Devonian fine-grained marine siliciclastic strata in the Appalachian Basin. Numerous palmatolepid, polygnathid and bispathodid conodonts, as well as a pyritized micro-molluscan dominated benthic fauna, indicate that the Three Lick beds were deposited as a dysoxic to anoxic substrate in an offshore deep shelf to basinal setting. The lower light grey bed of the Three Lick Bed contains a diverse conodont fauna that includes Palmatolepis gracilis expansa Sandberg and Ziegler, 1979 , indicative of the Palmatolepis gracilis expansa Zone, and the occurrence of Bisptahodus aculeatus anteposicornis ( Scott, 1961 ) in the middle light grey bed of the Three Lick Bed indicates the start of the Bispathodus aculeatus aculeatus Zone.
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