A spring is any natural occurrence where water Water is a ubiquitous chemical substance that is composed of hydrogen and oxygen and is vital for all known forms of life flows on to the surface of the earth from below the surface. Thus it is where the aquifer An aquifer is an underground layer of water-bearing permeable rock or unconsolidated materials from which groundwater can be usefully extracted using a water well. The study of water flow in aquifers and the characterization of aquifers is called hydrogeology. Related terms include: an aquitard, which is an impermeable layer along an aquifer, and surface meets the ground surface.
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