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  2. List of aquifers in the United States - Wikipedia

    en.wikipedia.org/wiki/List_of_aquifers_in_the...

    Aquifers of the United States Withdrawal rates from the Ogallala Aquifer.. This is a list of some aquifers in the United States.. Map of major US aquifers by rock type. An aquifer is a geologic formation, a group of formations, or a part of a formation that contains sufficient saturated permeable material to yield significant quantities of water to groundwater wells and springs.

  3. Hydrologic unit system (United States) - Wikipedia

    en.wikipedia.org/wiki/Hydrologic_unit_system...

    Aquifers of the United States are organized by national principal aquifer codes and names assigned by the National Water Information System (NWIS). Aquifers are identified by a geohydrologic unit code (a three-digit number related to the age of the formation) followed by a 4 or 5 character abbreviation for the geologic unit or aquifer name. [10]

  4. Ogallala Aquifer - Wikipedia

    en.wikipedia.org/wiki/Ogallala_Aquifer

    The Ogallala Aquifer (oh-gə-LAH-lə) is a shallow water table aquifer surrounded by sand, silt, clay, and gravel located beneath the Great Plains in the United States. As one of the world's largest aquifers, it underlies an area of approximately 174,000 sq mi (450,000 km 2) in portions of eight states (South Dakota, Nebraska, Wyoming, Colorado, Kansas, Oklahoma, New Mexico, and Texas). [1]

  5. Floridan aquifer - Wikipedia

    en.wikipedia.org/wiki/Floridan_Aquifer

    According to the United States Geological Survey, total withdrawals from the Floridan aquifer system in 2000 were ranked 5th highest of all principal aquifers in the nation at 3,640 million gallons per day (Mgal/d) (13.8 million m 3 /d; 11,200 acre⋅ft/d). [4]

  6. Equus Beds Aquifer - Wikipedia

    en.wikipedia.org/wiki/Equus_Beds_Aquifer

    The Equus Beds Aquifer is a distinct part the High Plains Aquifer System [1] and is a principal municipal aquifer in south-central Kansas, [2] underlying Hutchinson, McPherson, Newton, and Wichita. [ 3 ] [ 4 ]

  7. File:Edwards-Trinity aquifer system v1.svg - Wikipedia

    en.wikipedia.org/wiki/File:Edwards-Trinity...

    The published maps contain base and cultural features not included in these data. This is a replacement for the July 1998 map layer called Principal Aquifers of the 48 Conterminous United States. Purpose: These data are intended for use in publications, at a scale of 1:2,500,000 or smaller.

  8. Vast deposit of 'white gold' in Arkansas could be stunningly ...

    www.aol.com/vast-deposit-white-gold-arkansas...

    A map of the U.S. showing the geological area called the Smackover Formation. The highlighted portion in red, in southern Arkansas, was found by the U.S. Geological Survey to have high levels of ...

  9. Aquifer - Wikipedia

    en.wikipedia.org/wiki/Aquifer

    An aquifer in the same geologic unit may be confined in one area and unconfined in another. Unconfined aquifers are sometimes also called water table or phreatic aquifers, because their upper boundary is the water table or phreatic surface (see Biscayne Aquifer). Typically (but not always) the shallowest aquifer at a given location is ...