Blackwater Draw Formation
Unnamed Pliocene deposits
Quaternary deposit, undivided
Sand dune 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
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.