The accompanying chart showing a tentative correlation of the stratigraphic units of the Gulf Coast was compiled for use in a course in subsurface correlation taught by the writers at Louisiana State University. The present chart represents a revision and expansion of an earlier one prepared by Paul Montgomery and used for the same purpose. When the chart was prepared the writers had no intention of publishing it, but at the suggestion of many who have seen it and due to the outside demand for copies they dare to publish it.
They dare to publish it realizing that there are...
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