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Mineral Resources > Online Spatial Data > Geology > by state > Texas Geology

Geologic units in Presidio county, Texas

Eocene volcanic rocks (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers < 0.1 % of this area

Eocene volcanic rocks

Lithology: rhyolite

San Carlos Sandstone (Phanerozoic | Mesozoic | Cretaceous-Late) at surface, covers 0.4 % of this area

San Carlos Sandstone

Lithology: sandstone; coal

younger volcanic rocks of Davis Mountains area including Brooks Mountain, Goat Canyon, Medley, Barrel Springs, Wild Cherry, Eppenaurer Ranch, Mount Locke, and Merrill Formations (Phanerozoic | Cenozoic | Tertiary | Oligocene-Early) at surface, covers 0.5 % of this area

younger volcanic rocks of Davis Mountains area including Brooks Mountain, Goat Canyon, Medley, Barrel Springs, Wild Cherry, Eppenaurer Ranch, Mount Locke, and Merrill Formations

Lithology: trachyte; rhyolite; tuff; latite

Miocene intrusive rocks (Phanerozoic | Cenozoic | Tertiary | Miocene) at surface, covers < 0.1 % of this area

Miocene intrusive rocks

Lithology: basalt

Yucca Formation (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 0.2 % of this area

Yucca Formation

Lithology: conglomerate; sandstone; siltstone

Chinati Mountains caldera volcanic rocks, including Chinati Mountains Group, Mitchell Mesa Ignimbrite, and type area of Petan Basalt (Phanerozoic | Cenozoic | Tertiary | Oligocene) at surface, covers 8 % of this area

Chinati Mountains caldera volcanic rocks, including Chinati Mountains Group, Mitchell Mesa Ignimbrite, and type area of Petan Basalt

Lithology: rhyolite; basalt; ash-flow tuff; volcanic breccia (agglomerate); quartz monzonite; trachyte; andesite; dacite

Jones Basalt (Phanerozoic | Cenozoic | Tertiary | Oligocene) at surface, covers 2 % of this area

Jones Basalt

Lithology: basalt; trachyandesite

Tm2 and Tm3 units of Morita Ranch Formation (possibly from Cienega Mountain area) (Phanerozoic | Cenozoic | Tertiary | Oligocene) at surface, covers 0.9 % of this area

Tm2 and Tm3 units of Morita Ranch Formation (possibly from Cienega Mountain area)

Lithology: basalt; trachyte

Devils Graveyard volcanic rocks (Phanerozoic | Cenozoic | Tertiary | Eocene Oligocene) at surface, covers 0.8 % of this area

Devils Graveyard volcanic rocks

Lithology: tuff; basalt

Cox Sandstone (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 0.2 % of this area

Cox Sandstone

Lithology: mixed clastic/carbonate; limestone

upper part of Shely Group, including Tm4 or Morita Ranch Formation (Phanerozoic | Cenozoic | Tertiary | Oligocene) at surface, covers 0.9 % of this area

upper part of Shely Group, including Tm4 or Morita Ranch Formation

Lithology: rhyolite; basalt

Benevides Formation and Finlay Limestone, undivided (Phanerozoic | Mesozoic | Cretaceous-Early [Comanchean]) at surface, covers < 0.1 % of this area

Benevides Formation and Finlay Limestone, undivided

Lithology: limestone; sandstone; shale

Chisos Formation of Schiebout et al (1987) and the Big Yellow Sandstone Member of their Tornillo Formation, undivided (Phanerozoic | Cenozoic | Tertiary | Eocene Oligocene) at surface, covers 0.7 % of this area

Chisos Formation of Schiebout et al (1987) and the Big Yellow Sandstone Member of their Tornillo Formation, undivided

Lithology: sandstone; mudstone; tuff; conglomerate; mixed clastic/volcanic; basalt; trachyandesite

Ordovician rocks, undivided (Phanerozoic | Paleozoic| Ordovician) at surface, covers < 0.1 % of this area

Ordovician rocks, undivided

Lithology: limestone; shale

Cienequita Formation (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Middle Pennsylvanian-Late) at surface, covers < 0.1 % of this area

Cienequita Formation

Lithology: coarse-grained mixed clastic; sedimentary breccia; black shale; hornfels

Pinto Canyon Formation (Phanerozoic | Paleozoic | Permian [Leonard Guadalupe]) at surface, covers 0.2 % of this area

Pinto Canyon Formation

Lithology: limestone; siltstone; chert

Woods Hollow Shale, Fort Pena Formation, Alsate Shale, Marathon Limestone, and Dagger Flat Sandstone, undivided (Phanerozoic | Paleozoic| Cambrian Ordovician) at surface, covers < 0.1 % of this area

Woods Hollow Shale, Fort Pena Formation, Alsate Shale, Marathon Limestone, and Dagger Flat Sandstone, undivided

Lithology: mixed clastic/carbonate; chert; conglomerate

Bouquillas Formation (Phanerozoic | Mesozoic | Cretaceous-Late) at surface, covers 0.4 % of this area

Bouquillas Formation

Lithology: limestone; shale; mudstone; siltstone

Bofecillos volcano volcanic rocks, including units 1-8 of Rawls Formation and lava flows in upper part of Fresno Formation (Phanerozoic | Cenozoic | Tertiary | Oligocene) at surface, covers 10 % of this area

Bofecillos volcano volcanic rocks, including units 1-8 of Rawls Formation and lava flows in upper part of Fresno Formation

Lithology: basalt; trachyte; felsic volcanic rock; rhyolite

Santa Elena Limestone, Sue Peaks Formation, Del Carmen Limestone, and Telephone Canyon Formation, undivided (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 0.4 % of this area

Santa Elena Limestone, Sue Peaks Formation, Del Carmen Limestone, and Telephone Canyon Formation, undivided

Lithology: limestone; shale

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 (Phanerozoic | Cenozoic | Tertiary | Eocene-Late) at surface, covers < 0.1 % of this area

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

Lithology: rhyolite; trachyte; lava flow

Buda Limestone and Del Rio Clay, undivided (Phanerozoic | Mesozoic | Cretaceous-Late) at surface, covers < 0.1 % of this area

Buda Limestone and Del Rio Clay, undivided

Lithology: limestone; mudstone; clay or mud; siltstone; shale

Dimple Formation (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Early) at surface, covers < 0.1 % of this area

Dimple Formation

Lithology: limestone; shale

Loma Plata Formation (Phanerozoic | Mesozoic | Cretaceous-Early [Comanchean]) at surface, covers < 0.1 % of this area

Loma Plata Formation

Lithology: limestone; shale

Duff Formation (with Decie Member from Paisano caldera shown separately), Cottonwood Springs Basalt, Potato Hill Andesite, Sheep Canyon Basalt, Crossen Trachyte, and Pruett Formation, undivided (Phanerozoic | Cenozoic | Tertiary | Eocene-Late Oligocene-Early) at surface, covers 1 % of this area

Duff Formation (with Decie Member from Paisano caldera shown separaetly), Cottonwood Springs Basalt, Potato Hill Andesite, Sheep Canyon Basalt, Crossen Trachyte, and Pruett Formation, undivided

Lithology: rhyolite; basalt; tuff; sandstone; conglomerate; limestone

Duff Formation, Decie Member from Paisano caldera (Phanerozoic | Cenozoic | Tertiary | Oligocene-Early) at surface, covers 0.8 % of this area

Duff Formation, Decie Member from Paisano caldera

Lithology: rhyolite; trachyte; tuff; conglomerate

Infiernito caldera volcanic rocks including Capote Mountain Tuff, Tsh2 of Shely Group, Buckshot Ignimbrite, and Tm1 of Morita Ranch Formation (Phanerozoic | Cenozoic | Tertiary | Eocene-Late) at surface, covers 4 % of this area

Infiernito caldera volcanic rocks including Capote Mountain Tuff, Tsh2 of Shely Group, Buckshot Ignimbrite, and Tm1 of Morita Ranch Formation

Lithology: trachyte; rhyolite; sandstone; trachyandesite; latite; trachybasalt; basalt; ash-flow tuff; mudstone; conglomerate

Barnett Formation, Chappel Limestone, Houy, Zesch, Bear Spring, and Stribling Formations, and Pillar Bluff Limestone, undivided (Phanerozoic | Paleozoic | Devonian Carboniferous Mississippian-Early Mississippian-Middle Mississippian-Late) at surface, covers 0.3 % of this area

Barnett Formation, Chappel Limestone, Houy, Zesch, Bear Spring, and Stribling Formations, and Pillar Bluff Limestone, undivided

Lithology: limestone; shale; phosphorite; dolostone (dolomite); chert

Haymond Formation (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Early) at surface, covers < 0.1 % of this area

Haymond Formation

Lithology: medium-grained mixed clastic; fine-grained mixed clastic; conglomerate; arkose

Santana Tuff from Sierra Rica caldera in Mexico (Phanerozoic | Cenozoic | Tertiary | Oligocene) at surface, covers 0.5 % of this area

Santana Tuff from Sierra Rica caldera in Mexico

Lithology: ash-flow tuff

Alta Formation (Phanerozoic | Paleozoic | Permian [Wolfcamp]) at surface, covers 0.1 % of this area

Alta Formation

Lithology: sandstone; shale

Vieja Group, including Bracks Rhyolite, Chambers and Colmena Tuffs and Gill Breccia (Phanerozoic | Cenozoic | Tertiary | Eocene Oligocene) at surface, covers 6 % of this area

Vieja Group, including Bracks Rhyolite, Chambers and Colmena Tuffs and Gill Breccia

Lithology: rhyolite; sandstone; ash-flow tuff; breccia; conglomerate

Sue Peaks Formation (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers < 0.1 % of this area

Sue Peaks Formation

Lithology: limestone; shale; mudstone

Shafter Formation (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 0.3 % of this area

Shafter Formation

Lithology: mixed clastic/carbonate; sandstone

alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 20 % of this area

alluvium

Lithology: sand; silt; clay or mud; gravel

Quaternary-Tertiary bolson deposits (Phanerozoic | Cenozoic | Tertiary Quaternary | Pliocene Pleistocene) at surface, covers 6 % of this area

Quaternary-Tertiary bolson deposits

Lithology: clay or mud; silt; sandstone; conglomerate

Perdiz Conglomerate, Tascotal Formation, and tuffaceous sediments of Fresno Formation (Phanerozoic | Cenozoic | Tertiary | Oligocene) at surface, covers 18 % of this area

Perdiz Conglomerate, Tascotal Formation, and tuffaceous sediments of Fresno Formation

Lithology: sandstone; conglomerate; ash-flow tuff; mudstone

Finlay Limestone (Phanerozoic | Mesozoic | Cretaceous-Early [Comanchean Albian]) at surface, covers < 0.1 % of this area

Finlay Limestone

Lithology: limestone; siltstone; sandstone

Presidio Formation (Phanerozoic | Mesozoic | Cretaceous-Early [Aptian Albian]) at surface, covers 0.1 % of this area

Presidio Formation

Lithology: conglomerate; sandstone; siltstone

Pen Formation (Phanerozoic | Mesozoic | Cretaceous-Late) at surface, covers < 0.1 % of this area

Pen Formation

Lithology: clay or mud; sandstone

Santa Elena Limestone (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 0.2 % of this area

Santa Elena Limestone

Lithology: limestone; mudstone; chert

Bluff Mesa Formation (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 0.4 % of this area

Bluff Mesa Formation

Lithology: limestone; sandstone; shale

San Carlos Tuff from San Carlos caldera in Mexico (Phanerozoic | Cenozoic | Tertiary | Oligocene) at surface, covers < 0.1 % of this area

San Carlos Tuff from San Carlos caldera in Mexico

Lithology: ash-flow tuff

Tesnus Formation (Phanerozoic | Paleozoic | Carboniferous Mississippian-Late Pennsylvanian-Early) at surface, covers < 0.1 % of this area

Tesnus Formation

Lithology: medium-grained mixed clastic; fine-grained mixed clastic; chert; arkose; conglomerate

Quaternary-Tertiary deposits, undivided (Phanerozoic | Cenozoic | Tertiary Quaternary | Pliocene Pleistocene) at surface, covers 0.1 % of this area

Quaternary-Tertiary deposits, undivided

Lithology: gravel; conglomerate

Tertiary intrusive rocks, undivided (Phanerozoic | Cenozoic | Tertiary) at surface, covers < 0.1 % of this area

Tertiary intrusive rocks, undivided

Lithology: granite; granite

Del Carmen Limestone (Phanerozoic | Mesozoic | Cretaceous-Early ) at surface, covers 0.1 % of this area

Del Carmen Limestone

Lithology: limestone

Mississippi, Devonian, and Ordovician rocks, undivided (Phanerozoic | Paleozoic | Ordovician Devonian Carboniferous Mississippian) at surface, covers < 0.1 % of this area

Mississippi, Devonian, and Ordovician rocks, undivided

Lithology: novaculite; limestone; chert; shale

Oligocene intrusive rocks (Phanerozoic | Cenozoic | Tertiary | Oligocene) at surface, covers 1 % of this area

Oligocene intrusive rocks

Lithology: basalt; trachyte; felsic volcanic rock; rhyolite; phonolite; latite; trachyandesite

Eocene intrusive rocks (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers 0.3 % of this area

Eocene intrusive rocks

Lithology: basalt; trachyte; felsic volcanic rock; rhyolite; phonolite; latite; trachyandesite

Ross Mine Formation (Phanerozoic | Paleozoic | Permian [Guadalupe]) at surface, covers < 0.1 % of this area

Ross Mine Formation

Lithology: fine-grained mixed clastic

older alluvial deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene) at surface, covers 5 % of this area

older alluvial deposits

Lithology: gravel; sand; silt

Ojinaga Formation (Phanerozoic | Mesozoic | Cretaceous-Late) at surface, covers 0.4 % of this area

Ojinaga Formation

Lithology: shale; sandstone; limestone

Maxon Sandstone and Glen Rose Limestone, undivided (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 0.1 % of this area

Maxon Sandstone and Glen Rose Limestone, undivided

Lithology: sandstone; limestone

Black Gap area volcanic rocks (Phanerozoic | Cenozoic | Tertiary | Miocene) at surface, covers < 0.1 % of this area

Black Gap area volcanic rocks

Lithology: tuff; basalt

Mina Grande Formation (Phanerozoic | Paleozoic | Permian [Guadalupe]) at surface, covers < 0.1 % of this area

Mina Grande Formation

Lithology: limestone

alluvial fan deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers 6 % of this area

alluvial fan deposits

Lithology: alluvial fan

El Picacho Formation (Phanerozoic | Mesozoic | Cretaceous-Late) at surface, covers 2 % of this area

El Picacho Formation

Lithology: claystone; sandstone; coal

Tarantula Gravel (Phanerozoic | Cenozoic | Tertiary | Miocene) at surface, covers 0.3 % of this area

Tarantula Gravel

Lithology: gravel; tuff; trachyte; basalt; ignimbrite; quartzite; limestone

sand deposits, undivided (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers < 0.1 % of this area

sand deposits, undivided

Lithology: sand; silt

Cibolo Formation (Phanerozoic | Paleozoic | Permian [Leonard]) at surface, covers < 0.1 % of this area

Cibolo Formation

Lithology: limestone; shale

land slide deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers < 0.1 % of this area

land slide deposits

Lithology: landslide