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Ogallala Formation

CIMARRON- Generally semiconsolidated clay, silt, sand, gravel, and caliche 0 to 400 feet thick. BEAVER- Interbedded sand, siltstone, clay, gravel lenses, and thin limestone. Caliche common near surface but occurrence is not limited to the surface. Caliche accounts for most of the white color in the Ogallala. Other colors generally light tan or buff but locally may be pastel shades of almost any color. The Laverne and Rexroad Formations of Pliocene age and the Meade Group and Odee (of local usage) and other formations of Pleistocene age occur locally and are included with the Ogallala Formation, 0-700 feet thick. WOODWARD- Gravel, sand, silt, clay, caliche, and limestone, locally cemented with calcium carbonate. Generally light-tan to gray to white. Thickness ranges up to 400 feet and probably averages 150 feet. CLINTON- Gray to light-brown, fine- to medium-grained sand with some, clay, silt, gravel, volcanic ash, and caliche beds; locally cemented by calcium carbonate. Thickness ranges from 0 to about 320 feet. The formation thins eastward.
StateOklahoma
NameOgallala Formation
Geologic agePhanerozoic | Cenozoic | Tertiary | Pliocene
Original map labelTo
Primary rock typesand
Secondary rock typesiltstone
Other rock typesclay or mud; gravel; limestone; volcanic ash
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone (Bed)
Unconsolidated > Coarse-detrital > Gravel (Bed)
Unconsolidated > Fine-detrital > Clay (Bed)
Sedimentary > Clastic > Siltstone (Bed)
Unconsolidated > Coarse-detrital > Sand (Bed)
Minor
Igneous > Volcanic (Pyroclastic, air fall)
Map references
Heran, W. D., Green, G. and Stoeser, D. B., 2003, A Digital Geologic Map Database of Oklahoma: U. S. G. S. Open File Report 03-247
Unit references
Heran, W. D., Green, G. and Stoeser, D. B., 2003, A Digital Geologic Map Database of Oklahoma: U. S. G. S. Open File Report 03-247
Sapik, D.B. and Goemaat, R.L., 1973, Reconnaissance of the ground-water resources of Cimarron County, Oklahoma: U.S Geological Survey Hydrologic Investigations Atlas HA-373, scale 1:125,000, 3 sheets. (Geology on sheet 1 compiled by S.L. Schoff, 1943.)
Cederstrand, J.R., 1996c, Digital geologic map of Cimarron County, Oklahoma: U.S. Geological Survey Open-File Report 96-372, (1 diskette), URL address is: http://ok.water.usgs.gov/gis/geology
Morton, R.B. and Goemaat, R.L., 1973, Reconnaissance of the water resources of Beaver County, Oklahoma: U.S. Geological Survey Hydrologic Investigations Atlas HA-450, scale 1:125,000, 3 sheets. (Geology on sheet 1 compiled by S.L. Schoff, 1953.)
Cederstrand, J.R., 1996b, Digital geologic map of Beaver County, Oklahoma: U.S. Geological Survey Open-File Report 96-371, (1 diskette), URL address is: http://ok.water.usgs.gov/gis/geology
Morton, R.B., 1980, Reconnaissance of the water resources of the Woodward quadrangle, northwestern Oklahoma: Oklahoma Geological Survey, Hydrologic Atlas 8, scale 1:250,000, 4 sheets. (Geology on sheet 1 compiled by R.B. Morton, 1973, and R.O. Fay, 1977.)
Cederstrand, J.R., 1996l, Digital geologic map of Woodward quadrangles, northwestern Oklahoma: U.S. Geological Survey Open-File Report 96-381,(2 diskettes), URL address is: http://ok.water.usgs.gov/gis/geology
Carr, J.E. and Bergman, D.L., 1976, Reconnaissance of the water resources of the Clinton quadrangle, west-central Oklahoma: Oklahoma Geological Survey, Hydrologic Atlas 5, scale 1:250,000, 4 sheets. (Geology on sheet 1 compiled by J.E. Carr, 1972, and R.O. Fay, 1975.)
Cederstrand, J.R., 1996d, Digital geologic map of Clinton quadrangles, west-central Oklahoma: U.S. Geological Survey Open-File Report 96-373, (2 diskettes), URL address is: http://ok.water.usgs.gov/gis/geology
Geographic coverageBeaver - Beckham - Cimarron - Dewey - Ellis - Harper - Roger Mills - Texas - Woods - Woodward

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