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Michigan Environmental Education Curriculum
Groundwater Supply

Aquifers

A soil or rock formation which is capable of yielding usable amounts of water is known as an aquifer. If groundwater is trapped between two impermeable layers, it may become pressurized. This is known as an artesian aquifer. Wells drilled at certain places in an artesian aquifer will flow naturally due to the pressure in the aquifer. An aquifer which is only bounded on the bottom by an impermeable layer is known as an unconfined or water table aquifer.

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