Permian strata in the Palo Duro Basin consist of multicyclic sequences of carbonate, nodular and laminated anhydrite, bedded halite, chaotic mudstone-halite, and terrigenous clastic sediments.

Incidence of bloating among approximately 600 clay samples from East Texas, ranging in age from Gulfian (Late Cretaceous) to Recent, correlates principally with clay mineralogy-and pH--together an indication of bulk composition--and to a lesser extent with texture, loss on ignition, and content o

A geological investigation project was established in Atascosa County for two reasons:
(1) To search for high alumina clays; and
(2) To search for deposits of road metal.

A Mineral Resources Survey Project was conducted in Wilson County for the purpose of investigating occurrences of high alumina clays. Fifteen WPA laborers, under the supervision of the writer, were employed on the project.

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.