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

Geologic units in Erath county, Texas

Grindstone Creek Formation, expanded (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian [Des Moines]) at surface, covers 3 % of this area

Grindstone Creek Formation, expanded

Lithology: shale; sandstone; limestone

undivided part Fredericksberg Group (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 1 % of this area

undivided part Fredericksberg Group

Lithology: clay or mud; limestone; mudstone; shale

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

alluvium

Lithology: sand; silt; clay or mud; gravel

Lazy Bend Formation (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian [Des Moines]) at surface, covers 0.3 % of this area

Lazy Bend Formation

Lithology: shale; sandstone; limestone

Brazos River Formation (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian [Des Moines]) at surface, covers 2 % of this area

Brazos River Formation

Lithology: sandstone; conglomerate

Glen Rose Limestone (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 28 % of this area

Glen Rose Limestone

Lithology: limestone; clay or mud; sandstone; conglomerate

Mingus Formation (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian [Des Moines]) at surface, covers 4 % of this area

Mingus Formation

Lithology: shale; sandstone; limestone; coal

Walnut Clay (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 13 % of this area

Walnut Clay

Lithology: clay or mud; limestone; shale

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

Twin Mountains Formation (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 16 % of this area

Twin Mountains Formation

Lithology: sandstone; claystone; conglomerate

undivided part of Washita Group (Phanerozoic | Mesozoic | Cretaceous-Early [Comanchean]) at surface, covers < 0.1 % of this area

undivided part of Washita Group

Lithology: clay or mud; limestone; mudstone

Paluxy Sand (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 30 % of this area

Paluxy Sand

Lithology: sand; sandstone; limestone