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Geologic units in Archer county, Texas

Archer City Formation (Phanerozoic | Paleozoic | Permian [Wolfcamp]) at surface, covers 33 % of this area
Archer City Formation
Lithology: mudstone; sandstone; siltstone; conglomerate
Waggoner Ranch Formation (Phanerozoic | Paleozoic | Permian [Leonard]) at surface, covers 0.8 % of this area
Waggoner Ranch Formation
Lithology: shale; mudstone; limestone; siltstone; sandstone; conglomerate
Admiral and Coleman Junction Formations, undivided (Phanerozoic | Paleozoic | Permian [Wolfcamp]) at surface, covers 1 % of this area
Admiral and Coleman Junction Formations, undivided
Lithology: mudstone; shale; sandstone; limestone
high gravel deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene) at surface, covers 2 % of this area
high gravel deposits
Lithology: gravel; silt; sand
Markley Formation (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian Permian) at surface, covers 5 % of this area
Markley Formation
Lithology: sandstone; mudstone; conglomerate; coal; limestone
alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 5 % of this area
alluvium
Lithology: sand; silt; clay or mud; gravel
Quaternary deposit, undivided (Phanerozoic | Cenozoic | Quaternary) at surface, covers 0.7 % 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
Nocona Formation (Phanerozoic | Paleozoic | Permian [Wolfcamp Leonard]) at surface, covers 35 % of this area
Nocona Formation
Lithology: mudstone; sandstone; conglomerate
Petrolia Formation (Phanerozoic | Paleozoic | Permian [Wolfcamp Leonard]) at surface, covers 15 % of this area
Petrolia Formation
Lithology: mudstone ; sandstone; limestone
Terrace deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers 2 % of this area
Terrace deposits
Lithology: terrace; sand; gravel; silt; clay or mud

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