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)

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

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

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	Late Eocene
Lithologic constituents	Major Igneous > Volcanic > Felsic-volcanic > Rhyolite Igneous > Volcanic > Felsic-volcanic > Trachyte Incidental 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
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. 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.
NGMDB product	NGMDB product page for 68390
Counties	Brewster - Culberson - Jeff Davis - Pecos - Presidio - Reeves