The Pennsylvanian Red Fork Sandstone, which produces oil and gas, was deposited west of the Nemaha ridge during the time Cherokee deposition (Desmoinesian) in the large Enid embayment. There were four fairly distinct phases of sand deposition: an early phase during which channel sand was deposited, two phases of offshore-bar deposition, and a brief period when seas receded from the area and channel sand was deposited. By reconstruction of the depositional environments of the Red Fork Sandstone and by interpretation of this unit as representing four fairly distinct phases, the Red Fork is shown to be a reservoir with great potential in the Anadarko basin.

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