Abstract:Marine black and dark-gray shales of Late Devonian and Early Mississippian age occupy a prominent position in the stratigraphic column in the central midcontinent region because of their areal extent and relation to widespread unconformities of economic interest. These rock units, the Woodford and Chattanooga shales and the Arkansas novaculite, have been recognized over large parts of Kansas, Oklahoma, Arkansas, and Missouri, and are partial or total equivalents of each other. The Woodford shale was examined a… Show more
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