|Name||Ross Mine Formation|
|Geologic age||Permian; Guadalupe Series|
Sedimentary > Clastic > Mixed-clastic > Sandstone-mudstone (Bed)
Sedimentary > Carbonate > Limestone (Bed)
|Comments||Shale, sandstone, and limestone. In Shafter area, upper part alternating sh and ss, lenses of ls. below this is thin interbeds of ss and chert. in lower part alternations of ss and sh; ss med-grained, indurated, thinly bedded; shale silty laminted, fissil, black thickness of formation 727 ft in measured section. In Morita Basin ss predominates, some conglo, thickness about 160 ft. In upper Cibolo BAsin mostly sh, sandy muscovitic thin beds, ; ls forms ledges. thickness 150 ft|
Bureau of Economic Geology, 1979, Emory Peak--Presidio Sheet, Geologic Atlas of Texas, University of Texas at Austin.
Bureau of Economic Geology, 1992, Geologic Map of Texas: University of Texas at Austin, Virgil E. Barnes, project supervisor, Hartmann, B.M. and Scranton, D.F., cartography, scale 1:500,000.