The Greater Seminole district, comprising the Seminole, Searight, Earlsboro, Bowlegs, Little River, Pearson Switch, St. Louis, Mission, and Maud pools, had a total production previous to January 1, 1929, of more than 275,000,000 barrels of 40°gravity oil since the discovery in July, 1926. This is an average recovery of 15,055 barrels of oil from each of the 17,700 producing acres, and the area is producing 400,000 barrels of oil per day (January, 1929).

The stratigraphy, structure, and geologic history are similar to the other major "Wilcox" sand pools of northern Oklahoma. Crooked holes, pre-Pennsylvanian faults, and rotary drilling have complicated the details of the geologic record. All of the pools are producing from anticlinal structures, many of which are reflected in the surface formations as minor folds, flattenings, and changes of strike.

A chapter by Ira H. Cram of The Pure Oil Company gives an idea of the detailed geological problems in the district.

FOOTNOTE 3. A. I. Levorsen, "The Geology of Seminole County," Oklahoma Geol. Survey Bull. 40-BB (1928).

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