The Equus Beds Aquifer is a distinct part the High Plains Aquifer System and is a principal municipal

aquifer An aquifer is an underground layer of water-bearing material, consisting of permeability (Earth sciences), permeable or fractured rock, or of unconsolidated materials (gravel, sand, or silt). Aquifers vary greatly in their characteristics. The s ...

in south-central

Kansas Kansas ( ) is a landlocked U.S. state, state in the Midwestern United States, Midwestern region of the United States. It borders Nebraska to the north; Missouri to the east; Oklahoma to the south; and Colorado to the west. Kansas is named a ...

, underlying Hutchinson,

McPherson McPherson is a Scottish surname. It is an Anglicised form of the Gaelic ''Mac a' Phearsain'' and ''Mac a Phearsoin'', meaning "son of the parson". Notable people with the surname include: In sports *Adrian McPherson, American football player ...

Newton Newton most commonly refers to: * Isaac Newton (1642–1726/1727), English scientist * Newton (unit), SI unit of force named after Isaac Newton Newton may also refer to: People * Newton (surname), including a list of people with the surname * ...

, and Wichita. While generally illustrated as an extension of the Miocene-Pliocene

Ogallala Aquifer The Ogallala Aquifer () 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 in po ...

, this aquifer is composed of alternating beds of sand and clay mostly deposited in the later

Pleistocene The Pleistocene ( ; referred to colloquially as the ''ice age, Ice Age'') is the geological epoch (geology), epoch that lasted from to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fin ...

and was named the "McPherson Equus Beds" for having characteristic modern horse fossils. The aquifer beds overlie, and are partially recharged by the Dakota Aquifer and certain

Permian The Permian ( ) is a geologic period and System (stratigraphy), stratigraphic system which spans 47 million years, from the end of the Carboniferous Period million years ago (Mya), to the beginning of the Triassic Period 251.902 Mya. It is the s ...

aquifers. These particular High Plains Aquifers are also known sources of widespread natural salt contamination, including portions of the Equus Beds, which can be aggravated by human extraction of water as well as by

salt mining Salt mining extracts natural salt deposits from underground. The mined salt is usually in the form of halite (commonly known as rock salt), and extracted from evaporite Formation (geology), formations. History Before the advent of the moder ...

and

oil well An oil well is a drillhole boring in Earth that is designed to bring petroleum oil hydrocarbons to the surface. Usually some natural gas is released as associated petroleum gas along with the oil. A well that is designed to produce only gas m ...

References

Aquifers in the United States Neogene geology of Kansas {{Neogene-stub

Further reading

References