The most important development in the North and West-Central Texas area during the year was the remarkable number of new producing horizons discovered. In the K.M.A. field the Ellenburger (Ordovician) was found productive in the western part; two pools on the Bend arch in Young County and one pool on the eastern edge of the Permian Basin in Stonewall County found production in the Chappel limestone (Mississippian); in the Fort Worth syncline, a pool in Clay County and another in Montague County found production in the lower Bend conglomerate; the Caddo (Bend) was found productive in two pools on the Bend arch in Archer County, in two pools in the Fort Worth syncline in Clay County, and in one pool in Montague County; the Strawn series (Pennsylvanian) yielded production in two pools on the Bend Arch in Archer County and in one pool on the east flank of the arch in Clay County; the Canyon series yielded production in two pools on the west flank of the Bend arch in Baylor County, in one pool in Jones County, in one pool in Foard County on the Electra arch, and in one pool in Wilbarger County in the Red River syncline. New production was also found in the Cisco series in practically every producing county in the area, the most significant of which was probably in the Fargo pool in the Red River syncline in Wilbarger County.

Probably the only new stratigraphic discovery in the area was the tentative identification of Viola limestone (Ordovician) in two of the deeper wells in Clay County and two in Montague County and one in Wise County, all in the Fort Worth syncline.

Total production for North and West-Central Texas for 1940 was 49,221,213 barrels.

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