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Geologic units in Shackelford county, Texas

Quaternary deposit, undivided (Phanerozoic | Cenozoic | Quaternary) at surface, covers 0.1 % 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
Terrace deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers 2 % of this area
Terrace deposits
Lithology: terrace; sand; gravel; silt; clay or mud
Seymour Formation (Phanerozoic | Cenozoic | Quaternary | Pleistocene-Middle [Irvingtonian]) at surface, covers 0.7 % of this area
Seymour Formation
Lithology: sand; gravel; clay or mud
playa deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers 0.1 % of this area
playa deposits
Lithology: clay or mud; silt
alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 5 % of this area
alluvium
Lithology: sand; silt; clay or mud; gravel
Talpa Formation (Phanerozoic | Paleozoic | Permian [Leonard]) at surface, covers 9 % of this area
Talpa Formation
Lithology: shale; limestone
Sedwick Formation (Phanerozoic | Paleozoic | Permian [Wolfcamp]) at surface, covers 4 % of this area
Sedwick Formation
Lithology: mudstone; sandstone; limestone
Santa Anna Branch Shale (Phanerozoic | Paleozoic | Permian [Wolfcamp]) at surface, covers 5 % of this area
Santa Anna Branch Shale
Lithology: mudstone; shale; sandstone; limestone
Pueblo Formation (Phanerozoic | Paleozoic | Permian [Wolfcamp]) at surface, covers < 0.1 % of this area
Pueblo Formation
Lithology: mudstone; sandstone
Moran Formation (Phanerozoic | Paleozoic | Permian [Wolfcamp]) at surface, covers 5 % of this area
Moran Formation
Lithology: mudstone; sandstone; limestone
Lueders Formation (Phanerozoic | Paleozoic | Permian [Leonard]) at surface, covers 5 % of this area
Lueders Formation
Lithology: shale; limestone
Grape Creek Formation (Phanerozoic | Paleozoic | Permian [Leonard]) at surface, covers 5 % of this area
Grape Creek Formation
Lithology: shale; limestone
Elm Creek Formation (Phanerozoic | Paleozoic | Permian [Leonard]) at surface, covers 2 % of this area
Elm Creek Formation
Lithology: shale; mudstone; limestone
Coleman Junction Formation (Phanerozoic | Paleozoic | Permian [Wolfcamp]) at surface, covers 3 % of this area
Coleman Junction Formation
Lithology: mudstone; limestone; sandstone
Clear Fork Group (Phanerozoic | Paleozoic | Permian [Leonard]) at surface, covers 0.1 % of this area
Clear Fork Group
Lithology: mudstone; sandstone; dolostone (dolomite); siltstone; evaporite
Admiral Formation (Phanerozoic | Paleozoic | Permian [Wolfcamp]) at surface, covers 9 % of this area
Admiral Formation
Lithology: mudstone; limestone; sandstone

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