A mineral resource survey of Texas has been started by the Works Progress Administration, with the Bureau of Economic Geology of The University of Texas acting as sponsor. The purpose of the survey is to assemble information and make it available to the public. Through a separate project, sponsored by the State Planning Board, the results of the survey, as they are received in Austin, are being assembled for publication.

The principal natural mineral resources of Leon County consist of sand, clay, sandstone, gravel (both iron ore and river gravel), lignite, and natural gas. Natural gas is obtained from wells drilled 5,000 to 6,000 feet deep in the vicinity of a salt dome near Midway School and community, about 8 miles north-northeast of the county seat, Centerville.