Petrographic analyses combined with micro-paleontology were used to obtain information of correlative value from about thirty core holes and three wells in Covington County, Mississippi. Formation contacts in some places are indicated by distinctive assemblages of heavy minerals where fossils do not occur. Foraminiferal faunas are zonally characteristic of the Gulf Coast area, except where variations are due to deep water or other conditions of environment. Not all of the divisions in the standard geologic column for Mississippi can be recognized in wells, and some of the formation contacts are necessarily arbitrary.

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