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. The counties in which the mineral resource survey is being made were listed in Circular No. 1, issued on February 27, 1936. Since that circular was issued, the survey has been started in the following counties: Cherokee, Clay, El Paso, Fayette, Grimes, and Young.

The following report is based on work in Bexar County.