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Geologic units in Hansford county, Texas

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
Lithology: sand ; silt ; clay or mud; gravel; carbonate
Terrace deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers < 0.1 % of this area
Terrace deposits
Lithology: terrace; sand; gravel; silt; clay or mud
sand sheet deposits (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 0.6 % of this area
sand sheet deposits
Lithology: sand; silt
playa deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers 0.7 % of this area
playa deposits
Lithology: clay or mud; silt
Blackwater Draw Formation (Phanerozoic | Cenozoic | Quaternary | Pleistocene) at surface, covers < 0.1 % of this area
Blackwater Draw Formation
Lithology: sand; silt; clay or mud
alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 0.1 % of this area
alluvium
Lithology: sand; silt; clay or mud; gravel
Ogallala Formation (Phanerozoic | Cenozoic | Tertiary | Pliocene Miocene) at surface, covers 27 % of this area
Ogallala Formation
Lithology: sand; silt; clay or mud; gravel; carbonate
Pleistocene and Pliocene deposits, undifferentiated (Phanerozoic | Cenozoic | Tertiary Quaternary | Pliocene Pleistocene) at surface, covers 0.4 % of this area
TEXAS- Interfingering beds, tongues, and lenses of sand, silt, clay, gravel, sandstone, caliche, limestone, conglomerate, and volcanic ash. Includes Ogallala and Laverne Formations of Pliocene age and younger deposits of Pleistocene age. Locally the units are tightly cemented by calcium carbonate; other places, they are very poorly consolidated and nearly free of cementing materials. Thickness ranges from 0 to about 800 feet.
Lithology: sand; silt; clay or mud; gravel; sandstone; limestone; conglomerate; volcanic ash
Permian rocks undifferentiated (Phanerozoic | Paleozoic | Permian) at surface, covers < 0.1 % of this area
TEXAS- Red to dark reddish-brown shale, sandstone, and siltstone. Gypsum occurs in all rock units as a cementing agent, as tiny flakes, as thin irregular veinlets, and as discontinuous beds ranging from less than an inch to more than 30 feet thick. Maximum thickness exceeds 2,000 feet. BEAVER- Red shale, sandstone, and siltstone, are predominant rocks with lesser amounts of limestone, dolomite, gypsum, and salt. The undifferentiated Permian rocks include the Whitehorse Group, the Cloud Chief Formation, and the Quartermaster Formation; also included are local outcrops in the southwestern part of the county, which maybe Triassic in age, 3,800 feet thick
Lithology: shale; sandstone; siltstone; limestone; dolostone (dolomite); evaporite

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Page Last modified: 13:39 on 25-Apr-2014