Quartermaster Formation
(Permian; Guadalupe Series) at surface, covers 19 % of this area Quartermaster Formation; North and central Texas including panhandle.
Lingos Formation
(Middle (?) Pleistocene to Recent) at surface, covers 7 % of this area Lingos Formation
Ogallala Formation
(Pliocene to Miocene) at surface, covers 5 % of this area Ogallala Formation
Alluvium
(Holocene) at surface, covers 3 % of this area Alluvium
Tule Formation
(Pleistocene) at surface, covers 1 % of this area Tule Formation
Playa deposits
(Pleistocene and Holocene) at surface, covers 1 % of this area Playa deposits
Terrace deposits
(Pleistocene and Holocene) at surface, covers < 0.1 % of this area Terrace deposits