|Name||Older volcanic rocks of Davis and Barilla Mountains, including Sheep Pasture, Sleeping Lion, Frazier Canyon, Adobe Canyon, and Limpia formations, Gomez Tuff, Star Mountain Rhyolite, and Huelster Formation|
|Geologic age||Late Eocene|
Igneous > Volcanic > Felsic-volcanic > Rhyolite
Igneous > Volcanic > Felsic-volcanic > Trachyte
Sedimentary > Carbonate > Limestone
Sedimentary > Clastic > Sandstone
Sedimentary > Clastic > Conglomerate
|Comments||porphyritic rhyolite, quartz trachyte, trachyte tuffs and flows, some vitric-lith-crystal tuff and lapilli tuff and volcanic glass. Minor presence of thin layers of sandstone and conglomerate, lenses of fresh-water limestone and trachydoleritic lava|
Bureau of Economic Geology, 1968, Van Horn-El Paso Sheet, Geologic Atlas of Texas: Bureau of Economic Geology, The University of Texas at Austin, scale 1:250,000.
Bureau of Economic Geology, 1982, Fort Stockton Sheet, Geologic Atlas of Texas, University of Texas at Austin, scale 1:250,000.
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.
|Counties||Brewster - Culberson - Jeff Davis - Pecos - Presidio - Reeves|