USGS Home
Contact USGS
Search USGS

Mineral Resources > Online Spatial Data > Geology > by state > Texas Geology

Geologic units in Reagan county, Texas

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

playa deposits

Lithology: clay or mud; silt

Tahoka Formation (Phanerozoic | Cenozoic | Quaternary | Pleistocene [Wisconsinan]) at surface, covers 0.6 % of this area

Tahoka Formation

Lithology: clay or mud; silt; sand; gravel

Quaternary deposit, undivided (Phanerozoic | Cenozoic | Quaternary) at surface, covers 22 % 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

Lithology: sand ; silt ; clay or mud; gravel; carbonate

Buda Limestone (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 9 % of this area

Buda Limestone

Lithology: limestone

Edwards Limestone (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 40 % of this area

Edwards Limestone

Lithology: limestone; dolostone (dolomite); chert

Terrace deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers < 0.1 % of this area

Terrace deposits

Lithology: terrace; sand; gravel; silt; clay or mud

Blackwater Draw Formation (Phanerozoic | Cenozoic | Quaternary | Pleistocene) at surface, covers 26 % of this area

Blackwater Draw Formation

Lithology: sand; silt; clay or mud

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

caliche deposits

Lithology: evaporite

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

alluvium

Lithology: sand; silt; clay or mud; gravel