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Geologic units in Howard county, Texas

Ogallala Formation (Phanerozoic | Cenozoic | Tertiary | Pliocene Miocene) at surface, covers 23 % of this area

Ogallala Formation

Tahoka Formation (Phanerozoic | Cenozoic | Quaternary | Pleistocene [Wisconsinan]) at surface, covers 17 % of this area

Tahoka Formation

Lithology: clay or mud; silt; sand; gravel

sand sheet deposits (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 14 % of this area

sand sheet deposits

Lithology: sand; silt

Lingos Formation (Phanerozoic | Cenozoic | Quaternary | Pleistocene-Middle(?) Pleistocene-Late(?) Holocene) at surface, covers 12 % of this area

Lingos Formation

Lithology: sand; gravel; clay or mud; silt

sand deposits, undivided (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 12 % of this area

sand deposits, undivided

Lithology: sand; silt

Blackwater Draw Formation (Phanerozoic | Cenozoic | Quaternary | Pleistocene) at surface, covers 11 % of this area

Blackwater Draw Formation

Lithology: sand; silt; clay or mud

Quaternary deposit, undivided (Phanerozoic | Cenozoic | Quaternary) at surface, covers 5 % 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

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

alluvium

Lithology: sand; silt; clay or mud; gravel

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

sand dune deposits

Lithology: sand; silt

Dockum Group, undivided (Phanerozoic | Mesozoic | Triassic-Late) at surface, covers 1 % of this area

Dockum Group

Antlers Sand (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 0.6 % of this area

Antlers Sand

Edwards Limestone (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 0.4 % of this area

Edwards Limestone

playa deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers 0.3 % of this area

playa deposits

Lithology: clay or mud; silt