Geologic units in Ector county, Texas

Blackwater Draw Formation (Pleistocene) at surface, covers 38 % of this area

Blackwater Draw Formation

Caliche deposits (Pleistocene and Holocene) at surface, covers 32 % of this area

Caliche deposits

Sand sheet deposits (Holocene) at surface, covers 11 % of this area

Sand sheet deposits

Quaternary deposit, undivided (Quaternary) at surface, covers 7 % of this area

Quaternary deposit, undivided

Fredericksburg Group (Early Cretaceous; Comanchean Series) at surface, covers 3 % of this area

Fredericksburg Group

Maxon Sandstone and Glen Rose Limestone, undivided (Early Cretaceous) at surface, covers 3 % of this area

Maxon Sandstone and Glen Rose Limestone, undivided

Pond deposits (Pleistocene) at surface, covers 2 % of this area

Pond deposits

Alluvium (Holocene) at surface, covers 2 % of this area

Alluvium

Sand deposits, undivided (Holocene) at surface, covers 1 % of this area

Sand deposits, undivided

Dune sand sheet deposits (Holocene) at surface, covers 1 % of this area

Dune sand sheet deposits

Dockum Group, undivided (Late Triassic) at surface, covers 0.3 % of this area

Dockum Group

Playa deposits (Pleistocene and Holocene) at surface, covers 0.1 % of this area

Playa deposits

Antlers Sand (Early Cretaceous) at surface, covers < 0.1 % of this area

Antlers Sand

Edwards Limestone (Early Cretaceous) at surface, covers < 0.1 % of this area

Edwards Limestone

Ogallala Formation (Pliocene to Miocene) at surface, covers < 0.1 % of this area

Ogallala Formation