Aquifer

Rarity: Rare

A topic known well beyond its field, found in many languages.

Rarity follows how well known the article is: its views on the French and English Wikipedia over a year, and the number of languages it exists in.

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Notion

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Science and technology

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What Wikipedia says

An aquifer is an underground layer of water-bearing material consisting of permeable or fractured rock, or of unconsolidated materials (gravel, sand, or silt). Aquifers vary greatly in their characteristics. The study of water flow in aquifers and the characterization of aquifers is called hydrogeology.

Excerpt from the Wikipedia article “Aquifer”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: T.C. Winter, J.W. Harvey, O.L. Franke, and W.M. Alley, Public domain, via Wikimedia Commons.