A Preliminary Report on the Stratigraphy of the Uranium-Bearing Rocks of the Karnes County Area, South-Central Texas

Selenium in some oxidized sandstone-type uranium deposits

“…The suggestion made by Denson (1955), Eargle and Snyder (1957), and others that the uranium in at least some sandstone-type deposits is derived from tuffs or rocks containing volcanic ash and detritus is of interest to the writer, because he (Davidson and Powers, 1959) has demonstrated that some volcanic ash, and some rocks made up of volcanic ash contain selenium.…”

“…The deposits probably are in either the basal beds of the sands and clays of the Dubose Member of the Whitsett Formation or in the upper part of the Stones Switch Sandstone Member of the Whitsett Formation. Eargle and Snyder (1957) believe that the source of the uranium was in the tuffaceous sediments and that the uranium leached from the tuffaceous sediments was concentrated by evaporation or by interaction with clays and carbonaceous or other materials where ground waters were concentrated in stratigraphic or structural (fault) traps or channels. pies is low and there appears to be no relation between the selenium and uranium content of the samples.…”

“…According to Eargle and Snyder (1957), uranium minerals or radioactive rocks have been found in tuffaceous sand, silt, or bentonitic clay in at least 7 different stratigraphic positions ranging in age from late Eocene to Pliocene. The known radioactive minerals occur in the Goliad Sand of Pliocene age, the Oakville Sandstone of Miocene age, and the Catahoula Tuff of Miocene (?)…”

Principal uranium deposits of the world

“…References: Adams and Weeks, 1974;Brooks, 1975;Bunker and MacKallor, 1973;Crawford, 1975;Dickinson, 1973Dickinson, , 1976Dickinson and Sullivan, 1976;Eargle, Dickinson, and Davis, 1975;Eargle, Hinds, and Weeks, 1971;Eargle and Snider, 1957;Eargle and Weeks, 1961Finch, 1967;Flawn, 1967;Gottfried, Moore, and Caemmerer, 1962;Granger and Warren, 1974;Grutt, 1972;Harshman, 1974b;Klohn andPickens, 1970, 1974;Tatsch, 1976;White, 1975. Symbol: 27DCM Name:…”

Ground-water geology of Karnes County, Texas

“…Descriptions of geologic sections at several locations in Karnes and adjacent counties have been published in regional reports by Deussen (1924, p. 88, 92, 93) and Sellards, Adkins, and Plummer (1932, p. 688, 719, 720). A report by Eargle and Snider (1957) contains a description and geologic sections of the Jackson group in the west corner of the county; descriptions of the Frio clay, Catahoula tuff, and Oakville sandstone; and descriptions of major uranium deposits in Karnes, Atascosa, and Live Oak Counties. The public-water supplies of five towns in the county were described briefly by Broadhurst, Sundstrom, and Rowley (1950, p. 7-8, 75-79).…”