Morrowan sediments are recognized in the subsurface over most of the northern Texas panhandle. Morrowan terminology is based primarily on lithology and stratigraphic sequence with some faunal identification. The rocks are predominantly shales with less amounts of limestones and sandstones. The sandstones are of prime economic importance in the production of oil and gas distillate, and account for a greater part of the recent discoveries in the panhandle.

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