Rock formations that store groundwater water.

A body of rock whose fluid saturation, porosity and permeability permit production of groundwater.

In hydrologic terms, permeable layers of underground rock, or sand that hold or transmit groundwater below the water table that will yield water to a well in sufficient quantities to produce water for [..]

A permeable region of rock or soil through which ground water can move.

1897, coined from Latin aqui-, comb. form of aqua "water" (see aqua-) + -fer "bearing," from ferre "to bear, carry" (see infer).

An underground source of water. This water may be contained in a layer of rock, sand or gravel.

A water-bearing bed of porous rock, often sandstone.

an underground layer of rock or earth which holds groundwater. Read more in the NG Education Encyclopedia

an underground layer of sand or rock that contains usable water. Can be unconfined (down to the first impervious rock layer) or confined (between the first and the second layers). See Artesian.

A geologic formation, group of formations, or part of a formation that contains sufficient saturated permeable material to yield significant quantities of water to wells and springs.

a permeable rock which stores and transfers water. Useful when underlain by impermeable rock to trap the water and allow it to be tapped.

A body of rock, sand, or gravel that is sufficiently permeable to conduct ground water and to yield significant quantities of water to wells or springs.

A water-bearing layer of rock or sediment capable of holding and transmitting fluid (such as water, gas, or oil).

An aquifer overlain by a non-permeable layer or layers, in which pressure will force water to rise above the aquifer.

An aquifer containing unconfined groundwater separated from an underlying body of groundwater by an unsaturated zone.

The aquifer or combination of related aquifers in a given area that is the important economic source of water to wells.

Any aquifer that is not the main source of water to wells in a given area.

An aquifer in which the upper surface is the water table.

Underground water reservoir. aquifers

An underground sheet of permeable rock that groundwater runs through. It is often a source of water for wells and springs.

A layer in the soil that is capable of transporting a significant volume of groundwater.

A permeable layer of rock that retains water.

A layer of permeable rock or sand that contains water. An aquifer may be freshwater or saline (containing saltwater).

(L: aqua= water; ferre= to bear) a layer of rock that holds water and allows water to percolate through it, horizontally and vertically.

a geologic formation(s) that is water bearing. A geological formation or structure that stores and/or transmits water, such as to wells and springs. Use of the term is usually restricted to those water-bearing formations capable of yielding water in sufficient quantity to constitute a usable supply for people's uses.

soil or rock below the land surface that is saturated with water. There are layers of impermeable material both above and below it and it is under pressure so that when the aquifer is penetrated by a well, the water will rise above the top of the aquifer.

an aquifer whose upper water surface (water table) is at atmospheric pressure, and thus is able to rise and fall.

An Aquifer is a body of porous rock saturated with water. Gas fields are usually underlain by an aquifer which often provides pressure known as Water Drive

, Solution Gas

A body of permeable rock through which groundwater moves.

 – a body of permeable rock which can contain or transmit groundwater. Bakken

A layer in the soil that is capable of transporting a significant volume of groundwater.

an underground store of water, formed when water-bearing (permeable) rocks lie on top of impermeable rocks 

A store of water in the underground rocks.

[noun] A porous and permeable body of rock or sediment through which groundwater flows. Appears in modules:

body of rock or sediment that stores groundwater and allows the flow of groundwater.

Porous, water-bearing layers of sand gravel, and rock.

a porous rock unit containing water that can be extracted

A stratum of permeable rock that bears water. An unconfined aquifer is recharged directly by local rainfall, rivers and lakes, and the rate of recharge will be influenced by the permeability of the ov [..]

(n) underground bed or layer yielding ground water for wells and springs etc

A geologic formation that is water-bearing, and which transmits water from one point to another.

(English) underground reservoirs of water

An aquifer is a layer of material such as rock or sand, gravel, etc. that is found underground and from which water can be extracted.

an underground layer of rock, sediment or soil that is filled or saturated with water

an underground layer of loose rock, sand, or gravel that holds water in its spaces.

An underground bed or layer of earth, gravel, or porous stone that yields usable quantities of water to a well or spring.

An underground bed or layer of earth, gravel or porous stone that holds water.

An aquifer is a geological formation (or rock) that acts as a reservoir. It contains groundwater that can be used for drinking water, irrigation or geothermal applications, for example.

Underground bodies of water. There are two types of aquifers. Open aquifers have permeable materials overlying them, e.g. soil with underlying loose gravel. Closed aquifers are capped with an impervious layer of material, such as clay, which prevents water from penetrating from the soils directly above. The water level in aquifers rises and falls i [..]

A body of rock that is saturated with water or transmits water. When people drill wells, they tap water contained within an aquifer.

A geologic formation that is water-bearing, and which transmits water from one point to another.

Yields water for consumption, a porous formation.

a subsurface geological structure that contains water.

A water-bearing layer of rock or sediment that is capable of yielding useable amounts of water.  Drinking water and irrigation wells draw water from the underlying aquifer.

pockets of water existing below the water table; underground layer of water-bearing permeable rock or unconsolidated materials (e.g., gravel, sand, silt, clay) capable of a sustainable yield of a significant amount of water to a well or spring

An underground geological formation, or group of formations, containing usable amounts of groundwater that can supply wells and springs.

An underground geological formation, or group of formations, containing water. Are sources of groundwater for wells and springs.

An underground geological formation, or group of formations, containing water. Are sources of groundwater for wells and springs.

An underground rock formation composed of such materials as sand, soil, or gravel, that can store groundwater and supply it to wells and springs. In aquifers, groundwater occurs in sufficient quantiti [..]

An underground water-bearing geological formation that is capable of transmitting water in sufficient quantities to serve as a source of groundwater supply.

A natural underground area where large quantities of ground water fill the spaces between rocks and sediment. According to Idaho's Ground Water Quality Rule (pdf on Department of Administration W [..]

A porous soil or rock formation which holds water.

Underground source of water

An underground bed or layer of earth, gravel or porous stone that contains water. The depth of this layer can vary from a few feet to several hundred feet below the ground.

Layer of water-bearing permeable rock, sand, or gravel capable of providing significant amounts of water.

a porous layer of loose rock deep underground that retains water, creating a large underground reservoir

A geological layer or “formation,” typically sand, gravel, or limestone, that can store and transmit groundwater and allow it to be pumped in “useful” quantities.

An underground reservoir.

Any formation of rock that contains water. Usually underground and formed by layers of soil and rock. May supply water to a well or a spring.

An underground geological formation or group of formations, containing or conducting water. Aquifers are sources of groundwater for wells and springs.

A natural, underground layer of porous, water-bearing materials (sand, gravel) usually capable of yielding a large amount or supply of water.

A geologic formation that holds groundwater. Many non-MWRA communities rely on wells drilled into aquifers for their drinking water supplies.

A body of permeable rock that can contain or transmit groundwater.

A geologic formation(s) that is water bearing. A geological formation or structure that stores and/or transmits water, such as to wells and springs. Use of the term is usually restricted to those wate [..]

(confined) Soil or rock below the land surface that is saturated with water. There are layers of impermeable material both above and below it and it is under pressure so that when the aquifer is penet [..]

(unconfined) An aquifer whose upper water surface (water table) is at atmospheric pressure, and thus is able to rise and fall.

Porous, water-bearing layers of sand, gravel, or rock.

A layer or zone below the surface of the earth, which is capable of yielding a significant volume of water.

Permeable layers of underground rock, or sand that hold or transmit groundwater below the water table that will yield water to a well in sufficient quantities to produce water for beneficial use.

In hydrologic terms, permeable layers of underground rock, or sand that hold or transmit groundwater below the water table that will yield water to a well in sufficient quantities to produce water for beneficial use.

saturated, permeable geological unit that is capable of yielding economically significant quantities of water to wells or springs.

an underground gravel channel through which groundwater flows.

An underground geologic formation composed of materials such as rock, sand, soil or gravel that can store and supply ground water to wells and springs. Aquifers in Alaska can be as little as a few fee [..]

a geologic formation that will yield water to a well in sufficient quantities to make the production of water from this formation feasible for beneficial use; permeable layers of underground rock or s [..]

Water bearing layer of the earth's crust.

Water bearing layer of the earth's crust.  Best Management Practices (BMPs): Good housekeeping solutions that include the proper handling, storage and disposal of toxic materials to prevent storm water pollution. BMPs can include source controls (controls that keep pollutants out of runoff) and treatment controls (controls that remove pollutan [..]

A saturated permeable geologic unit that can transmit significant quantities of water under ordinary hydraulic gradients.

water-bearing geological formation that will yield water to a well or spring; aquifers can be classified as confined or unconfined.

A body of rock that is sufficiently permeable to conduct ground water and to yield economically significant quantities of water to wells and springs [Bates, Robert L., and Jackson, Julia A., eds., 1987, Glossary of Geology (3d ed.): Alexandria, Va., American Geological Institute, p. 33].

A water-bearing layer of soil,  sand,  gravel, or rock that will yield usable quantities of water to a well.

An underground layer of water-bearing permeable rock or unconsolidated materials (gravel, sand or silt) from which groundwater can be extracted using a water well.

an underground layer of unconsolidated rock or soil that is saturated with usable amounts of water (a zone of saturation).

A geological formation of permeable rock, gravel, or sand containing or conducting groundwater, especially one that supplies water for wells, springs, etc.

An underground layer of water-bearing permeable rock or unconsolidated materials (gravel, sand, silt or clay) from which groundwater can be extracted using a water well. Azimuth

An aquifer is a formation, group of formations, or part of a formation that contains sufficient saturated permeable material to yield significant quantities of water to wells and springs.

ak-wuh-fer Underground zone of permeable rock saturated with water under pressure.

an underground zone of permeable rock saturated with water under pressure. For gas storage applications, an aquifer will need to consist of a permeable lower layer of rock and an impermeable upper lay [..]

A body of permeable rock that can contain or transmit groundwater.

An underground geological formation, or group of formations, containing fresh water. Represents a source of ground water that is drawn via wells or appears on the surface in springs.

Water-bearing structure.

An underground layer of water-bearing rock or gravel, sand or silt.

An underground layer of water-bearing permeable rock or unconsolidated materials (gravel, sand, or silt) from which groundwater can be usefully extracted using a water well.

A water-bearing rock strata. In a water-drive field the aquifer is the water zone of the reservoir underlying the oil zone.

An underground water reservoir contained between layers of rock, sand or gravel.

A water-bearing rock strata. In a water-drive field, the aquifer is the water zone of the reservoir underlying the oil zone.

A body of permeable rock that can contain or transmit groundwater.

A body of permeable rock or sediment that is saturated with water and yields useful amounts of water.

A layer of rock with sufficient porosity

An underground layer of fluid-bearing permeable rock or unconsolidated materials (gravel, sand, or silt) with significant permeability to allow flow

a bed or layer yielding water for wells and springs etc.; an underground geological formation capable of receiving, storing and transmitting large quantities of water. Aquifer types include: confined [..]

A body of rock, or a zone within a body of rock, that cotains sufficient saturated permeable material to yield economically significant quantities of ground water to wells and springs.

Underground source of water

Underground geologic formation or group of formations, containing groundwater that can supply wells and springs.

Underground rock layer that holds groundwater. Often an important source of water for public use, agriculture and industry.

a geologic unit that can store and transmit water at rates fast enough to supply reasonable amounts to wells[10]

 a bed, rock formation or other geological structure within the upper layer of the Earth's crust containing sufficient voids to allow the storage and flow of ground water. It is connected by perm [..]

In hydrologic terms, permeable layers of underground rock, or sand that hold or transmit groundwater below the water table that will yield water to a well in sufficient quantities to produce water for [..]

Rocks or unconsolidated sediments that are capable of yielding a significant amount of water to a well or a spring.

A porous, subsurface geological structure carrying or holding water.

A water-bearing layer of rock or sediment that is capable of yielding useable amounts of water. Drinking water and irrigation wells draw water from the underlying aquifer.

An underground layer of water-bearing porous stone, earth, or gravel ''The water from the well came from an aquifer.''

 An underground store of water that is usually used as a source for extraction.

an underground layer of rock which holds fresh water and allows water to percolate through it. 

Natural underground water reservoir.

A water bearing stratum of permeable  rock, sand or gravel.

Groundwater resources in some defined area.