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Geologic units in Potter county, Texas

Tecovas Formation (Phanerozoic | Mesozoic | Triassic-Late) at surface, covers 43 % of this area

Tecovas Formation

Blackwater Draw Formation (Phanerozoic | Cenozoic | Quaternary | Pleistocene) at surface, covers 24 % of this area

Blackwater Draw Formation

Lithology: sand; silt; clay or mud

Quartermaster Formation and Whitehorse Group, undivided (Phanerozoic | Paleozoic | Permian [Guadalupe]) at surface, covers 19 % of this area

Quartermaster Formation and Whitehorse Group, undivided

Ogallala Formation (Phanerozoic | Cenozoic | Tertiary | Pliocene Miocene) at surface, covers 6 % of this area

Ogallala Formation

alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 2 % of this area

alluvium

Lithology: sand; silt; clay or mud; gravel

Trujillo Formation (Phanerozoic | Mesozoic | Triassic-Late) at surface, covers 1 % of this area

Trujillo Formation

dune sand sheet deposits (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 1 % of this area

dune sand sheet deposits

Lithology: sand; silt

Terrace deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers 0.8 % of this area

Terrace deposits

Quaternary deposit, undivided (Phanerozoic | Cenozoic | Quaternary) at surface, covers 0.7 % of this area

sand, silt, clay, and gravel. locally indurated with calcium carbonate (caliche); includes point bar, natural levee, stream channel, sand dune, terrace, alluvial fan, landslide bolson and playa deposits

playa deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers 0.7 % of this area

playa deposits

Lithology: clay or mud; silt

sand sheet deposits (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 0.5 % of this area

sand sheet deposits

Lithology: sand; silt