Geologic units in Hudspeth county, Texas

Alluvium (Holocene) at surface, covers 27 % of this area

Alluvium

Hueco Limestone (Permian; Wolfcamp Series) at surface, covers 9 % of this area

Hueco Limestone

Alluvial fan deposits (Pleistocene and Holocene) at surface, covers 7 % of this area

Alluvial fan deposits

Victorio Peak Formation (Permian; Leonard Series) at surface, covers 7 % of this area

Victorio Peak Formation

Finlay Limestone (Early Cretaceous; Comanchean; Albian Series) at surface, covers 7 % of this area

Finlay Limestone

Sand sheet deposits (Holocene) at surface, covers 6 % of this area

Sand sheet deposits

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

Quaternary-Tertiary bolson deposits

Older alluvial deposits (Pleistocene) at surface, covers 6 % of this area

Older alluvial deposits

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

Bolson deposits

Campagrande Formation (Early Cretaceous) at surface, covers 2 % of this area

Campagrande Formation

Cox Sandstone (Early Cretaceous) at surface, covers 2 % of this area

Cox Sandstone

Wilke Ranch Formation (Permian; Leonard Series) at surface, covers 2 % of this area

Wilke Ranch Formation

Yucca Formation (Early Cretaceous) at surface, covers 2 % of this area

Yucca Formation

Alkali flat deposits (Holocene) at surface, covers 1 % of this area

Alkali flat deposits

Eagle Mountains caldera volcanic rocks (Oligocene) at surface, covers 1 % of this area

Eagle Mountains caldera volcanic rocks

Dune sand sheet deposits (Holocene) at surface, covers 1 % of this area

Dune sand sheet deposits

Cutoff Formation (Permian; Leonard Series) at surface, covers 1.0 % of this area

Cutoff Formation

Bluff Mesa Formation (Early Cretaceous) at surface, covers 1.0 % of this area

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

Oligocene intrusive rocks (Oligocene) at surface, covers 1.0 % of this area

Oligocene intrusive rocks

Hazel Formation (preCambrian (Proterozoic); Grenville Series) at surface, covers 0.8 % of this area

Hazel Formation

Cretaceous rocks, undivided (Late Cretaceous) at surface, covers 0.8 % of this area

Cretaceous rocks, undivided

Benevides Formation and Finlay Limestone, undivided (Early Cretaceous; Comanchean Series) at surface, covers 0.5 % of this area

Benevides Formation and Finlay Limestone, undivided

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

Allamore Formation (preCambrian (Proterozoic); Grenville Series) at surface, covers 0.4 % of this area

Allamore Formation

Espy Formation (Early Cretaceous) at surface, covers 0.3 % of this area

Espy Formation

Carrizo Mountain Group showing metasedimentary rocks (preCambrian (Proterozoic)) at surface, covers 0.3 % of this area

Carrizo Mountain Group showing metasedimentary rocks

Bone Spring Formation (Permian; Leonard Series) at surface, covers 0.3 % of this area

Bone Spring Formation

Fusselman Dolomite (Early and Middle Silurian) at surface, covers 0.3 % of this area

Fusselman Dolomite

Carrizo Mountain Group showing metaigneous rocks (preCambrian (Proterozoic)) at surface, covers 0.2 % of this area

Carrizo Mountain Group showing metaigneous rocks

Quitman Mountains caldera volcanic rocks and volcanic rocks of sneed (Cox) Mountain and west of Victorio Peak (Oligocene) at surface, covers 0.2 % of this area

Quitman Mountains caldera volcanic rocks and volcanic rocks of sneed (Cox) Mountain and west of Victoria Peak

Ojinaga Formation (Late Cretaceous) at surface, covers 0.2 % of this area

Ojinaga Formation

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

Loma Plata Formation

Goat Seep Formation (Permian; Guadalupe Series) at surface, covers 0.2 % of this area

Goat Seep Formation

Comanchean rocks, undivided (Early Cretaceous; Washita Series) at surface, covers 0.2 % of this area

Comanchean rocks, undivided

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

Buda Limestone and Eagle Mountain Sandstone, undivided

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

Montoya Dolomite

Mingus Formation (Pennsylvanian; Des Moines Series) at surface, covers 0.1 % of this area

Mingus Formation

Van Horn Sandstone (preCambrian (Proterozoic); Grenville Series) at surface, covers 0.1 % of this area

Van Horn Sandstone

Capitan Formation (Permian; Guadalupe Series) at surface, covers 0.1 % of this area

Capitan Formation

Malone Formation (Late Jurassic) at surface, covers 0.1 % of this area

Malone Formation

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

Land slide deposits

Helms Shale, Rancheria Formation, Las Cruces Limestone, Percha Shale, and Canutillo Formations, undivided (Late Mississippian; Chesteran; and Devonian) at surface, covers < 0.1 % of this area

Helms Shale, Rancheria Formation, Las Cruces Limestone, Percha Shale, and Canutillo Formations, undivided

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

Eocene intrusive rocks

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

Rhyolite

San Andres Formation (Guadalupian and Leonardian) at surface, covers < 0.1 % of this area

Limestone and dolomite with minor shale. Guadalupian in south, in part Leonardian to north.

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

Briggs Formation

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

Alluvium

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

Torcer Formation

Etholen Conglomerate (Early Cretaceous) at surface, covers < 0.1 % of this area

Etholen Conglomerate

Benevides Formation (Early Cretaceous; Comanchean Series) at surface, covers < 0.1 % of this area

Benevides Formation

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

Buda Limestone and Del Rio Clay, undivided; 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.

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

Granite

Tarantula Gravel (Miocene) at surface, covers < 0.1 % of this area

Tarantula Gravel

Carlsbad Group (Permian; Guadalupe Series) at surface, covers < 0.1 % of this area

Carlsbad Group

Buda Limestone (Early Cretaceous) at surface, covers < 0.1 % 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.

Tertiary intrusive rocks of intermediate to silicic composition (Pliocene to Eocene) at surface, covers < 0.1 % of this area

Includes monzonitic to granitic plutons, stocks, laccoliths, and porphyritic dikes in deeply eroded magmatic centers; and andesitic, dacitic, or rhyolitic plugs and dikes near cauldrons or stratovolcanoes. In the Latir field, fine-grained rhyolitic dikes commonly cut coarse-grained granitic plutons. Includes alkaline laccoliths, plugs, and dikes in Colfax County. North-trending dikes near Capitan include some mafic diabase dikes.

Cutoff Shale (Leonardian) at surface, covers < 0.1 % of this area

In Brokeoff Mountains only.

Lower Cretaceous, undivided (Lower Cretaceous) at surface, covers < 0.1 % of this area

In northern Lea and Roosevelt Counties includes equivalents of Tucumcari Shale; in Cornudas Mountains includes Campogrande and Cox Formations and Washita Group; at Cerro de Cristo Rey includes several formations of the Fredricksburg and Washita Groups, and the Boquillas Formation (Cenomanian); in the southwest includes Mojado, U-Bar (Aptian), and Hell-to-Finish Formations, whch are equivalent to Bisbee Group of Arizona.

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

Basin facies - sandstone, limestone, and shale.

Victorio Peak Limestone (Leonardian) at surface, covers < 0.1 % of this area

In Brokeoff Mountains only.

Boracho Limestone (Early Cretaceous) at surface, covers < 0.1 % of this area

Boracho Limestone

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

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

Yeso Formation (Leonardian) at surface, covers < 0.1 % of this area

Sandstones, siltstones, anhydrite, gypsum, halite, and dolomite.