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Geologic units in Hardeman county, Texas

Blaine Formation (Phanerozoic | Paleozoic | Permian [Guadalupe]) at surface, covers 51 % of this area

Blaine Formation

sand sheet deposits (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 20 % of this area

sand sheet deposits

Lithology: sand; silt

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

dune sand sheet deposits

Lithology: sand; silt

Clear Fork Group (Phanerozoic | Paleozoic | Permian [Leonard]) at surface, covers 6 % of this area

Clear Fork Group

San Angelo Formation (Phanerozoic | Paleozoic | Permian [Guadalupe]) at surface, covers 6 % of this area

San Angelo Formation

alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 3 % of this area

alluvium

Lithology: sand; silt; clay or mud; gravel

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

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

Terrace deposits