Groundwater flowing through certain types of rocks can produce caves or natural openings below the surface that are connected to the surface.
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To be more helpful to those 13 and anyone else... The "certain types of rocks" are those soluble in naturally slightly acidic groundwater, so are limestone (primary constituent, calcium carbonate) and gypsum (calcium sulphate).
Further, the water has to penetrate the rock formation - it oozes through the joints, bedding-planes, faults and other permeable discontinuities and eventually dissolves their wall rock enough to give discrete, stream-bearing conduits - and escape through risings (springs).
other material
undefined aquifer
water.aquiferAquiferan aquifer
An aquifer transports groundwater, which is water stored underground in the spaces between rocks and sediment. Groundwater in an aquifer can flow very slowly through the porous material, supplying water to wells, springs, and surface water bodies.
The top level of groundwater in an aquifer is called the water table.
The top level of groundwater in an aquifer is called the water table.
The top level of groundwater in an aquifer is called the water table.
groundwater
aquifer.
other material
an aquifer
undefined aquifer
Do you mean an aquifer?I don't really get the question. Message me back.The correct answer is an aquifer.
It is called an aquifer.
Water table
An aquifer.
both the water table and the groundwater is at the top of the aquifer