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High Plains Aquifer Resources and Information
Geologic units of the High Plains aquifer *

High Plains Aquifer main page

Geologic units of the High Plains aquifer
 Location where geologic unit is a substantial part of the High Plains aquifer
Geologic unit comprising the aquiferSystem (series) and High Plains aquifer comprising millions of years before presentCompositionCOKSNENMOKSDTXWY
Valley-fill and alluvial depositQuaternary (Holocene and Pleistocene), 1.8 to presentA XXX    
Dune sandQuaternary (Holocene), 0.008 to 0.0015B XX     
Ogallala FormationTertiary (Miocene), 19 to 5CX XXXXXXX
Arikaree GroupTertiary (Miocene and Oligocene), 29 to 19D  X  X X
Brule FormationTertiary (Oligocene), 31 to 29EX X    X
Composition:
A = Clay, silt, sand, and gravel, unconsolidated
B = Sand, very fine to medium-grained, windblown
C = Clay, silt, sand, and gravel, generally unconsolidated; where cemented by calcium carbonate, mortar beds formed
D = Sandstone, very fine to fine-grained, with beds of volcanic ash, silty sand, and sandy clay
E = Siltstone, massive, with beds of sandstone, volcanic ash, and clay

* Table modified from Dugan and others, 1994 (http://pubs.er.usgs.gov/usgspubs/wri/wri944027).

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References

Dugan, J.T., McGrath, Timothy, and Zelt, R.B., 1994, Water-level changes in the High Plains aquifer--predevelopment to 1992: U.S. Geological Survey Water-Resources Investigations Report 94-4027, 56 p.

Emry, R.J., Bjork, P.R., and Russell, L.S., 1987, The Chadronian, Orellan, and Whitneyan North American land mammal ages, in Woodburne, M.O., ed., Cenozoic mammals of North America: Berkeley and Los Angeles, University of California Press, p. 118-152.

Gutentag, E.D., Heimes, F.J., Krothe, N.C., Luckey, R.R., and Weeks, J.B., 1984, Geohydrology of the High Plains aquifer in parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming: U.S. Geological Survey Professional Paper 1400-B, 63 p.

Swinehart, J.B., 1989, Wind-blown deposits, in Bleed, Ann, and Flowerday, Charles, eds., An atlas of the Sand Hills: University of Nebraska-Lincoln, Institute of Agriculture and Natural Resources, Conservation and Survey Division, Resource Atlas 5, p. 45-56.

Tedford, R.H., Galusha, Theodore, Skinner, M.F., Taylor, B.E., Fields, R.W., Macdonald, J.R., Rensberger, J.M., Webb, S.D., and Whistler, D.P., 1987, Faunal succession and biochronology of the Arikareean through Hemphillian interval (late Oligocene through the earliest Pliocene Epochs) in North America: Berkeley and Los Angeles, University of California Press, p. 153-210.

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