化か石せき水すい

noun

fossil water; paleowater

Technical term in hydrology and geology for ancient groundwater trapped in an aquifer for thousands to millions of years. Often contrasted with modern recharge water.

See also: 地下水

• サハラ砂さ漠ばくの地ち下かには大たい量りょうの化か石せき水すいが存そん在ざいする。

  Large amounts of fossil water exist beneath the Sahara Desert.