Salado and Castile Formations, undivided
Alluvial fan deposits
Bell Canyon Formation
Older alluvial deposits
Cherry Canyon Formation
Sand sheet deposits
Brushy Canyon Formation
Bone Spring Formation
Gypsum of Rustler, Salado, and Castile Formations, undivided
Wiley Mountain caldera volcanic rocks
Victorio Peak Formation
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.
Bell Canyon, Cherry Canyon, and Brushy Canyon Formations undivided
Seven Rivers Formation
El Paso Formation and Bliss Sandstone, undivided
Eocene intrusive rocks
Van Horn Sandstone
Goat Seep Formation
Quaternary-Tertiary bolson deposits
Loma Plata Formation
Van Horn Mountains caldera volcanic rocks
Benevides Formation and Finlay Limestone, undivided
Carrizo Mountain Group showing metasedimentary rocks
Bluff Mesa Formation; Western part of Trans-Pecos Texas.
Eagle Mountains caldera volcanic rocks
Buda Limestone and Eagle Mountain Sandstone, undivided
Dominantly anhydrite sequence.
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.
Land slide deposits
Carrizo Mountain Group showing metaigneous rocks
Vieja Group, including Bracks Rhyolite, Chambers and Colmena Tuffs and Gill Breccia
Buda Limestone and San Martine Member of Borache Limestone, undivided
Alkali flat deposits
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
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
Siltstone, gypsum, sandstone, and dolomite.
Oligocene intrusive rocks
Sandstone, gypsum, anhydrite, dolomite, and red mudstone.
Evaporite sequence, dominantly halite.
Basin facies - sandstone, limestone, and shale.
Limestone (reef facies).
Maxon Sandstone and Glen Rose Limestone, undivided
Dewey Lake Red beds
Gypsum, anhydrite, salt, dolomite, and siltstone.
Tertiary intrusive rocks, undivided