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definition of the word chert

by the Wiktionnary

Singular
chert

Plural
uncountable

chert (uncountable)

  1. (geology) Impure, massive, generally dull colored and usually opaque, flintlike quartz or hornstone. By general usage in mineralogy and geology, a chert does not have a conchoidal fracture. In North American archeology the term chert occasionally is still used for various siliceous minerals (including flint) that have a conchoidal fracture, resulting in confusion between flint and chert in some archeology texts.


Definition from Wiktionary
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