Geologic units in Culberson county, Texas

Salado and Castile Formations, undivided (Permian; Ochoa Series) at surface, covers 17 % of this area

Salado and Castile Formations, undivided

Alluvium (Holocene) at surface, covers 12 % of this area

Alluvium

Alluvial fan deposits (Pleistocene and Holocene) at surface, covers 11 % of this area

Alluvial fan deposits

Bell Canyon Formation (Permian; Guadalupe Series) at surface, covers 8 % of this area

Bell Canyon Formation

Older alluvial deposits (Pleistocene) at surface, covers 7 % of this area

Older alluvial deposits

Cherry Canyon Formation (Permian; Guadalupe Series) at surface, covers 7 % of this area

Cherry Canyon Formation

Rustler Formation (Permian; Ochoa Series) at surface, covers 7 % of this area

Rustler Formation

Bolson deposits (Pleistocene and Holocene) at surface, covers 4 % of this area

Bolson deposits

Sand sheet deposits (Holocene) at surface, covers 3 % of this area

Sand sheet deposits

Cox Sandstone (Early Cretaceous) at surface, covers 3 % of this area

Cox Sandstone

Brushy Canyon Formation (Permian; Guadalupe Series) at surface, covers 3 % of this area

Brushy Canyon Formation

Capitan Formation (Permian; Guadalupe Series) at surface, covers 2 % of this area

Capitan Formation

Hueco Limestone (Permian; Wolfcamp Series) at surface, covers 2 % of this area

Hueco Limestone

Bone Spring Formation (Permian; Leonard Series) at surface, covers 1 % of this area

Bone Spring Formation

Gypsum of Rustler, Salado, and Castile Formations, undivided (Permian; Ochoa Series) at surface, covers 1 % of this area

Gypsum of Rustler, Salado, and Castile Formations, undivided

Wiley Mountain caldera volcanic rocks (Eocene) at surface, covers 1 % of this area

Wiley Mountain caldera volcanic rocks

Victorio Peak Formation (Permian; Leonard Series) at surface, covers 1 % of this area

Victorio Peak Formation

Buda Limestone (Early Cretaceous) at surface, covers 0.8 % of this area

Buda Limestone; Eastern part of Trans-Pecos and High Plains and Western part of Trans-Pecos and North, central, and south Texas including Quaternary for all of west Texas.

Yates Formation (Permian; Guadalupe Series) at surface, covers 0.8 % of this area

Yates Formation

Boracho Limestone (Early Cretaceous) at surface, covers 0.8 % of this area

Boracho Limestone

Bell Canyon, Cherry Canyon, and Brushy Canyon Formations undivided (Permian; Guadalupe Series) at surface, covers 0.7 % of this area

Bell Canyon, Cherry Canyon, and Brushy Canyon Formations undivided

Seven Rivers Formation (Permian; Guadalupe Series) at surface, covers 0.7 % of this area

Seven Rivers Formation

Carlsbad Group (Permian; Guadalupe Series) at surface, covers 0.6 % of this area

Carlsbad Group

Yearwood Formation (Early Cretaceous) at surface, covers 0.5 % of this area

Yearwood Formation

Hazel Formation (preCambrian (Proterozoic); Grenville Series) at surface, covers 0.5 % of this area

Hazel Formation

El Paso Formation and Bliss Sandstone, undivided (Late Cambrian? to Early Ordovician) at surface, covers 0.4 % of this area

El Paso Formation and Bliss Sandstone, undivided

Munn Formation (Permian; Guadalupe Series) at surface, covers 0.4 % of this area

Munn Formation

Eocene intrusive rocks (Eocene) at surface, covers 0.4 % of this area

Eocene intrusive rocks

Tansill Formation (Permian; Guadalupe Series) at surface, covers 0.3 % of this area

Tansill Formation

Van Horn Sandstone (preCambrian (Proterozoic); Grenville Series) at surface, covers 0.3 % of this area

Van Horn Sandstone

Goat Seep Formation (Permian; Guadalupe Series) at surface, covers 0.3 % of this area

Goat Seep Formation

Finlay Limestone (Early Cretaceous; Comanchean; Albian Series) at surface, covers 0.3 % of this area

Finlay Limestone

Quaternary-Tertiary bolson deposits (Pliocene to Pleistocene) at surface, covers 0.2 % of this area

Quaternary-Tertiary bolson deposits

Loma Plata Formation (Early Cretaceous; Comanchean Series) at surface, covers 0.2 % of this area

Loma Plata Formation

Tarantula Gravel (Miocene) at surface, covers 0.2 % of this area

Tarantula Gravel

Van Horn Mountains caldera volcanic rocks (Eocene) at surface, covers 0.2 % of this area

Van Horn Mountains caldera volcanic rocks

Benevides Formation and Finlay Limestone, undivided (Early Cretaceous; Comanchean Series) at surface, covers 0.1 % of this area

Benevides Formation and Finlay Limestone, undivided

Carrizo Mountain Group showing metasedimentary rocks (preCambrian (Proterozoic)) at surface, covers 0.1 % of this area

Carrizo Mountain Group showing metasedimentary rocks

Bouquillas Formation (Late Cretaceous) at surface, covers 0.1 % of this area

Bouquillas Formation

Bluff Mesa Formation (Early Cretaceous) at surface, covers 0.1 % of this area

Bluff Mesa Formation; Western part of Trans-Pecos Texas.

Eagle Mountains caldera volcanic rocks (Oligocene) at surface, covers 0.1 % of this area

Eagle Mountains caldera volcanic rocks

Montoya Dolomite (Middle and Late Ordovician) at surface, covers 0.1 % of this area

Montoya Dolomite

Leona Formation (Pleistocene) at surface, covers 0.1 % of this area

Leona Formation

Fusselman Dolomite (Early and Middle Silurian) at surface, covers < 0.1 % of this area

Fusselman Dolomite

Buda Limestone and Eagle Mountain Sandstone, undivided (Late Cretaceous) at surface, covers < 0.1 % of this area

Buda Limestone and Eagle Mountain Sandstone, undivided

Castile Formation (Upper Permian) at surface, covers < 0.1 % of this area

Dominantly anhydrite sequence.

Piedmont alluvial deposits (Holocene to lower Pleistocene) at surface, covers < 0.1 % of this area

Includes deposits of higher gradient tributaries bordering major stream valleys, alluvial veneers of the piedmont slope, and alluvial fans. May locally include uppermost Pliocene deposits.

Jones Basalt (Oligocene) at surface, covers < 0.1 % of this area

Jones Basalt

Toy Limestone (Early (?) Pleistocene) at surface, covers < 0.1 % of this area

Toy Limestone

Land slide deposits (Pleistocene and Holocene) at surface, covers < 0.1 % of this area

Land slide deposits

Carrizo Mountain Group showing metaigneous rocks (preCambrian (Proterozoic)) at surface, covers < 0.1 % of this area

Carrizo Mountain Group showing metaigneous rocks

Cutoff Formation (Permian; Leonard Series) at surface, covers < 0.1 % of this area

Cutoff Formation

Vieja Group, including Bracks Rhyolite, Chambers and Colmena Tuffs and Gill Breccia (Eocene to Oligocene) at surface, covers < 0.1 % of this area

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

Buda Limestone and San Martine Member of Borache Limestone, undivided (Late Cretaceous) at surface, covers < 0.1 % of this area

Buda Limestone and San Martine Member of Borache Limestone, undivided

Alkali flat deposits (Holocene) at surface, covers < 0.1 % of this area

Alkali flat deposits

Artesia Group (Guadalupian) at surface, covers < 0.1 % of this area

Shelf facies forming broad south-southeast trending outcrop from Glorieta to Artesia area; includes Tansill, Yates, Seven Rivers, Queen and Grayburg Formations (Guadalupian). May locally include Moenkopi Formation (Triassic) at top.

Gulfian rocks, undivided (Late Cretaceous) at surface, covers < 0.1 % of this area

Gulfian rocks, undivided

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 (Late Eocene) 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

Allamore Formation (preCambrian (Proterozoic); Grenville Series) at surface, covers < 0.1 % of this area

Allamore Formation

Rustler Formation (Upper Permian) at surface, covers < 0.1 % of this area

Siltstone, gypsum, sandstone, and dolomite.

Oligocene intrusive rocks (Oligocene) at surface, covers < 0.1 % of this area

Oligocene intrusive rocks

Queen and Grayburg Formations (Guadalupian) at surface, covers < 0.1 % of this area

Sandstone, gypsum, anhydrite, dolomite, and red mudstone.

Alluvium (Holocene to upper Pleistocene) at surface, covers < 0.1 % of this area

Alluvium

Salado Formation (Upper Permian) at surface, covers < 0.1 % of this area

Evaporite sequence, dominantly halite.

Yucca Formation (Early Cretaceous) at surface, covers < 0.1 % of this area

Yucca Formation

Ojinaga Formation (Late Cretaceous) at surface, covers < 0.1 % of this area

Ojinaga Formation

Markley Formation (Pennsylvanian to Early Permian) at surface, covers < 0.1 % of this area

Markley Formation

Bell Canyon Formation (Guadalupian) at surface, covers < 0.1 % of this area

Basin facies - sandstone, limestone, and shale.

Capitan Formation (Guadalupian) at surface, covers < 0.1 % of this area

Limestone (reef facies).

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

Maxon Sandstone and Glen Rose Limestone, undivided

Dewey Lake Red beds (Permian; Ochoa Series) at surface, covers < 0.1 % of this area

Dewey Lake Red beds

Seven Rivers Formation (Guadalupian) at surface, covers < 0.1 % of this area

Gypsum, anhydrite, salt, dolomite, and siltstone.

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

Tertiary intrusive rocks, undivided

Aguja Formation (Late Cretaceous) at surface, covers < 0.1 % of this area

Aguja Formation