During 1942 the north and west-central Texas area contributed 38 new discoveries and 12 extensions of proved fields or successful completions in new pay zones in areas already productive. This compares with 33 new discoveries and 11 extensions during 1941. According to available information the discovery methods responsible for these new producing areas are as follows: 3 random drilling, 4 surface geology, 11 subsurface geology, 14 seismograph, 1 geochemical, and 5 a combination of two or more methods.

The discovery of oil in Simpson rocks in Montague County is probably the most important development during 1942. The extent or profitability of Simpson production remains speculative at this time, but the addition of this objective in the Fort Worth basin enhances the possibilities of the area. The discovery of Marble Falls production in the Forestburg pool in southeastern Montague County is also important.

Seismograph mapping continues to be an effective method of exploration in the district.