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 (TXEOd;0)

State	Texas
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	Phanerozoic \| Cenozoic \| Tertiary \| Eocene-Late
Original map label	Ed
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
Primary rock type	rhyolite
Secondary rock type	trachyte
Other rock types	lava flow
Lithologic constituents	Major Igneous > Volcanic > Felsic-volcanic > Rhyolite Igneous > Volcanic > Felsic-volcanic > Trachyte Incidental Sedimentary > Carbonate > Limestone Sedimentary > Clastic > Conglomerate Sedimentary > Clastic > Sandstone
Map references	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
Unit references	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.
Geographic coverage	Brewster - Culberson - Jeff Davis - Pecos - Presidio - Reeves