Morrow sediments occupy the northwestern Anadarko basin-Hugoton embayment area southwest of a northwest-southeast diagonal line extending from north-central Harper County to the southeastern corner of Dewey County. More than 1,400 feet of Morrow has been encountered in a deep well in southern Ellis County. The formation thins to zero, due to transgressive overlap northeast.

Very few of the wells that drilled the entire Morrow section have failed to encounter shows. Production now extends along a 60-mile trend. Both oil and gas have been found. At present it is felt that the gas reserves are by far the more important.

Maps and cross sections illustrate the structure, distribution and thickness of the Morrow formation.

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