USGS Home
Contact USGS
Search USGS

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

Geologic units in Menard county, Texas

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

Permian rocks, undivided

Lithology: shale; sandstone; evaporite; dolostone (dolomite); siltstone

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

alluvium

Lithology: sand; silt; clay or mud; gravel

Canyon Group, undivided (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Late [Missouri]) at surface, covers 1 % of this area

Canyon Group, undivided

Lithology: fine-grained mixed clastic; medium-grained mixed clastic; limestone

Antlers Sand (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers < 0.1 % of this area

Antlers Sand

Lithology: sand; clay or mud; conglomerate; sandstone; claystone

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

Terrace deposits

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

Edwards Limestone (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 84 % of this area

Edwards Limestone

Lithology: limestone; dolostone (dolomite); chert

Hensell Sand (Phanerozoic | Mesozoic | Cretaceous-Early [Comanchean) at surface, covers 8 % of this area

Hensell Sand

Lithology: limestone; sand; conglomerate; shale

Sparta Sand (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers < 0.1 % of this area

Sparta Sand

Lithology: sand; clay or mud; silt; sandstone; coal

Buda Limestone (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 0.3 % of this area

Buda Limestone

Lithology: limestone

Gorman Formation (Phanerozoic | Paleozoic| Ordovician-Early) at surface, covers < 0.1 % of this area

Gorman Formation

Lithology: limestone; dolostone (dolomite)

Tanyard Formation (Phanerozoic | Paleozoic | Ordovician-Early) at surface, covers < 0.1 % of this area

Tanyard Formation

Lithology: limestone; dolostone (dolomite)

Quaternary deposit, undivided (Phanerozoic | Cenozoic | Quaternary) at surface, covers 0.2 % 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