Lingos Formation
(Middle (?) Pleistocene to Recent) at surface, covers 15 % of this area Lingos Formation
Alluvium
(Holocene) at surface, covers 6 % of this area Alluvium
Quartermaster Formation
(Permian; Guadalupe Series) at surface, covers 5 % of this area Quartermaster Formation; North and central Texas including panhandle.
Blaine Formation
(Permian; Guadalupe Series) at surface, covers 2 % of this area Blaine Formation
Terrace deposits
(Pleistocene and Holocene) at surface, covers 0.5 % of this area Terrace deposits
Playa deposits
(Pleistocene and Holocene) at surface, covers 0.2 % of this area Playa deposits
Ogallala Formation
(Pliocene to Miocene) at surface, covers < 0.1 % of this area Ogallala Formation