Includes scattered lacustrine, playa, and alluvial deposits of the Tahoka, Double Tanks, Tule, Blanco, Blackwater Draw, and Gatuna Formations, the latter of which may be Pliocene at base; outcrops, however, are basically of Quaternary deposits.
Bull Canyon Formation
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.
Alluvial and eolian deposits, and petrocalcic soils of the southern High Plains. Locally includes Qoa.
Upper Chinle Group, Garita Creek through Redonda Formations, undivided
Consists of Dakota Group, which includes Romeroville Sandstone (Cenomanian), Pajarito Shale, and Mesa Rica Sandstone (Albian); the underlying Tucumcari Shale (Albian) in Tucumcari area and Glencairn Formation (Albian) in Union County.
Upper Jurassic nonmarine rocks.
Consists of Entrada Sandstone, Todilto and Summerville Formations, Bluff Sandstone, and locally Zuni Sandstone (or only Acoma Tongue of Zuni).
In southwest includes the basalt-bearing Broken Jug Formation.
Includes associated alluvial and eolian deposits of major lake basins.
Garita Creek Formation
Cretaceous rocks, undivided
Sand deposits, undivided
Dune sand sheet deposits
Sand sheet deposits
Quaternary deposit, undivided