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Geologic units in Archer county, Texas

Nocona Formation (Phanerozoic | Paleozoic | Permian [Wolfcamp Leonard]) at surface, covers 56 % of this area

Nocona Formation

alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 15 % of this area

alluvium

Lithology: sand; silt; clay or mud; gravel

high gravel deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene) at surface, covers 7 % of this area

high gravel deposits

Lithology: gravel; silt; sand

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

Terrace deposits

Admiral and Coleman Junction Formations, undivided (Phanerozoic | Paleozoic | Permian [Wolfcamp]) at surface, covers 4 % of this area

Admiral and Coleman Junction Formations, undivided

Waggoner Ranch Formation (Phanerozoic | Paleozoic | Permian [Leonard]) at surface, covers 3 % of this area

Waggoner Ranch Formation

Archer City Formation (Phanerozoic | Paleozoic | Permian [Wolfcamp]) at surface, covers 3 % of this area

Archer City Formation

Quaternary deposit, undivided (Phanerozoic | Cenozoic | Quaternary) at surface, covers 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

Petrolia Formation (Phanerozoic | Paleozoic | Permian [Wolfcamp Leonard]) at surface, covers 2 % of this area

Petrolia Formation

Markley Formation (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian Permian) at surface, covers < 0.1 % of this area

Markley Formation