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Geologic units in Crockett county, Texas

Quaternary deposit, undivided (Phanerozoic | Cenozoic | Quaternary) at surface, covers 55 % 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

Buda Limestone (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 31 % of this area

Buda Limestone

Lithology: limestone

Maxon Sandstone and Glen Rose Limestone, undivided (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 5 % of this area

Maxon Sandstone and Glen Rose Limestone, undivided

Lithology: sandstone; limestone

Edwards Limestone (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 3 % of this area

Edwards Limestone

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

sand sheet deposits

Lithology: sand; silt

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

Bouquillas Formation

Washita Group (Phanerozoic | Mesozoic | Cretaceous-Early [Comanchean] Cretaceous-Late ) at surface, covers 1 % of this area

Washita Group

Lithology: clay or mud; limestone

playa deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers 0.9 % of this area

playa deposits

Lithology: clay or mud; silt

Fredericksburg Group (Phanerozoic | Mesozoic | Cretaceous-Early [Comanchean]) at surface, covers 0.4 % of this area

Fredericksburg Group

alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 0.4 % of this area

alluvium

Lithology: sand; silt; clay or mud; gravel

Gatuna Formation (Phanerozoic | Cenozoic | Quaternary | Pleistocene-Middle(?)) at surface, covers 0.3 % of this area

Gatuna Formation

Finlay Limestone (Phanerozoic | Mesozoic | Cretaceous-Early [Comanchean Albian]) at surface, covers < 0.1 % of this area

Finlay Limestone

Permian rocks, undivided (Phanerozoic | Paleozoic | Permian) at surface, covers < 0.1 % of this area

Permian rocks, undivided