Used for the thick sequence of shale-rich strata at the base of the Cincinnatian Series. Nearly equivalent to the old Latonia or Eden shales of the traditional system, although the top of the Kope is placed several meters below the traditional top of the Latonia. Used in the U.S.G.S./Kentucky Survey, Ohio Survey, and Indiana Survey systems, as well as in Tobin's revision to the traditional system. Includes offshore facies of the C1 sequence.