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Geologic units in Stonewall county, Texas

Quartermaster Formation (Phanerozoic | Paleozoic | Permian [Guadalupe]) at surface, covers < 0.1 % of this area
Quartermaster Formation
Lithology: shale; sandstone; evaporite; 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
San Angelo Formation (Phanerozoic | Paleozoic | Permian [Guadalupe]) at surface, covers 7 % of this area
San Angelo Formation
Lithology: mudstone; siltstone; evaporite
sand sheet deposits (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 10 % of this area
sand sheet deposits
Lithology: sand; silt
Terrace deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers 2 % of this area
Terrace deposits
Lithology: terrace; sand; gravel; silt; clay or mud
Whitehorse Group, undivided (Phanerozoic | Paleozoic | Permian [Guadalupe]) at surface, covers 27 % of this area
Whitehorse Group, undivided
Lithology: sandstone; shale; evaporite
Blaine Formation (Phanerozoic | Paleozoic | Permian [Guadalupe]) at surface, covers 45 % of this area
Blaine Formation
Lithology: mudstone; evaporite; dolostone (dolomite); sandstone
dune sand sheet deposits (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers < 0.1 % of this area
dune sand sheet deposits
Lithology: sand; silt
alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 3 % of this area
alluvium
Lithology: sand; silt; clay or mud; gravel
Dockum Group, undivided (Phanerozoic | Mesozoic | Triassic-Late) at surface, covers < 0.1 % of this area
Dockum Group
Lithology: fine-grained mixed clastic; limestone; conglomerate
Clear Fork Group (Phanerozoic | Paleozoic | Permian [Leonard]) at surface, covers 4 % of this area
Clear Fork Group
Lithology: mudstone; sandstone; dolostone (dolomite); siltstone; evaporite
Lingos Formation (Phanerozoic | Cenozoic | Quaternary | Pleistocene-Middle(?) Pleistocene-Late(?) Holocene) at surface, covers 2 % of this area
Lingos Formation
Lithology: sand; gravel; clay or mud; silt
Comanche Peak Limestone, Walnut Clay, and Antlers Sand, undivided (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers < 0.1 % of this area
Comanche Peak Limestone, Walnut Clay, and Antlers Sand, undivided
Lithology: limestone; shale; fine-grained mixed clastic

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Page Last modified: 11:25 on 07-Jan-2014