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Geologic units in Shackelford county, Texas

Admiral Formation (Phanerozoic | Paleozoic | Permian [Wolfcamp]) at surface, covers 16 % of this area

Admiral Formation

Talpa Formation (Phanerozoic | Paleozoic | Permian [Leonard]) at surface, covers 16 % of this area

Talpa Formation

Lithology: shale; limestone

Grape Creek Formation (Phanerozoic | Paleozoic | Permian [Leonard]) at surface, covers 9 % of this area

Grape Creek Formation

Lithology: shale; limestone

Lueders Formation (Phanerozoic | Paleozoic | Permian [Leonard]) at surface, covers 9 % of this area

Lueders Formation

Lithology: shale; limestone

Moran Formation (Phanerozoic | Paleozoic | Permian [Wolfcamp]) at surface, covers 9 % of this area

Moran Formation

alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 8 % of this area

alluvium

Lithology: sand; silt; clay or mud; gravel

Santa Anna Branch Shale (Phanerozoic | Paleozoic | Permian [Wolfcamp]) at surface, covers 8 % of this area

Santa Anna Branch Shale

Sedwick Formation (Phanerozoic | Paleozoic | Permian [Wolfcamp]) at surface, covers 7 % of this area

Sedwick Formation

Coleman Junction Formation (Phanerozoic | Paleozoic | Permian [Wolfcamp]) at surface, covers 6 % of this area

Coleman Junction Formation

Elm Creek Formation (Phanerozoic | Paleozoic | Permian [Leonard]) at surface, covers 5 % of this area

Elm Creek Formation

Lithology: shale; mudstone; limestone

Terrace deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers 4 % of this area

Terrace deposits

Seymour Formation (Phanerozoic | Cenozoic | Quaternary | Pleistocene-Middle [Irvingtonian]) at surface, covers 1 % of this area

Seymour Formation

Lithology: sand; gravel; clay or mud

Clear Fork Group (Phanerozoic | Paleozoic | Permian [Leonard]) at surface, covers 0.3 % of this area

Clear Fork Group

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

playa deposits

Lithology: clay or mud; silt

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

Pueblo Formation (Phanerozoic | Paleozoic | Permian [Wolfcamp]) at surface, covers < 0.1 % of this area

Pueblo Formation

Lithology: mudstone; sandstone