Caliche definitions

kə-lē'chē
A hardened conglomeration of gravel, rock, and soil that contains sodium nitrate, potassium nitrate, etc., found mainly in arid regions of Chile and Argentina.
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A type of hardpan found in arid regions, as in the SW U.S., containing calcareous deposits, esp. of calcium carbonate.
noun
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(mineralogy) A crude form of sodium nitrate from South America; used as a fertilizer.
noun
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A layer of hard clay subsoil or sedimentary rock; hardpan.
noun
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Origin of caliche

American Spanish from Spanish pebble in a brick, flake of lime from cal lime from Latin calx calc- lime calx