New data on the age and stratigraphic relations of several of the later Upper Cretaceous units of the eastern Gulf region have shown the desirability of modifying their generally accepted classification. These changes are indicated in a correlation chart covering the Cretaceous deposits of the Atlantic and Gulf Coastal Plain and trans-Pecos Texas, prepared by L. W. Stephenson and P. B. King, and recently transmitted by the Director of the Geological Survey to C. O. Dunbar, Chairman of the Committee on Stratigraphy of the National Research Council, for publication by that committee.

The Selma chalk, as heretofore defined in west-central...

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