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A · B · C · D · E · F · G · H · I · J · K · L · M · N · O · P · Q · R · S · T · U · V · W · X · Y · Z   entire Web this site well A shaft sunk vertically into the Earth's crust through which water, oil, natural gas, brine, sulfur, and other mineral substances can be extracted. Artesian wells are sunk into water-bearing rock strata, the so-called aquifers, from which water rises under pressure to the surface. Related category    • WATER SUPPLY Also on this site: Encyclopedia of Science Transport Concepts & Designs (partner site) BACK TO TOP