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  5. Texas geologic units

Geologic units in Lubbock county, Texas

Blackwater Draw Formation (Pleistocene) at surface, covers 93 % of this area

Blackwater Draw Formation

Ogallala Formation (Pliocene to Miocene) at surface, covers 4 % of this area

Ogallala Formation

Blanco Formation (Pliocene) at surface, covers 0.8 % of this area

Blanco Formation

Quaternary deposit, undivided (Quaternary) at surface, covers 0.5 % of this area

Quaternary deposit, undivided

Alluvium (Holocene) at surface, covers 0.4 % of this area

Alluvium

Sand dune deposits (Holocene) at surface, covers 0.4 % of this area

Sand dune deposits

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

Dockum Group

Playa deposits (Pleistocene and Holocene) at surface, covers 0.2 % of this area

Playa deposits

Pond deposits (Pleistocene) at surface, covers < 0.1 % of this area

Pond deposits

Sand sheet deposits (Holocene) at surface, covers < 0.1 % of this area

Sand sheet deposits

Comanche Peak Limestone, Walnut Clay, and Antlers Sand, undivided (Early Cretaceous) at surface, covers < 0.1 % of this area

Comanche Peak Limestone, Walnut Clay, and Antlers Sand, undivided; North, central, and south Texas including Quaternary for all of west Texas.