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Deutsche Hornstein {m} [min.] Synonyme

hornstein  

Englische chert Synonyme

chert Definition

Chert
(n.) An impure, massive, flintlike quartz or hornstone, of a dull color.

chert Bedeutung

chert variety of silica containing microcrystalline quartz
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Chert is a fine-grained sedimentary rock composed of microcrystalline or cryptocrystalline silica. Depending on its origin, it can contain either microfossils, small macrofossils, or both. It varies greatly in color , but most often manifests as gray, brown, grayish brown and light green to rusty red; its color is an expression of trace elements present in the rock, and both red and green are most often related to traces of iron .