chert

chert  (chûrt)

n.

1. A variety of silica that contains microcrystalline quartz.

2. A siliceous rock of chalcedonic or opaline silica occurring in limestone.

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[Origin unknown.]

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cherty adj.

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chert [tʃɜːt]

n

(Earth Sciences / Minerals) a microcrystalline form of silica usually occurring as bands or layers of pebbles in sedimentary rock. Formula: SiO₂. Varieties include flint, lyddite (Lydian stone) Also called hornstone

[of obscure origin]

cherty  adj

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chert  (chûrt)

A hard, brittle sedimentary rock consisting of microcrystalline quartz. It is often reddish-brown to green but can also occur in a variety of other colors, especially white, pink, brown, or black. Chert often contains impurities such as calcium, iron-oxide, or the remains of silica-rich organisms. It usually occurs as nodules in limestone and dolomite and has curved fractures.

Thesaurus

Noun

1.

chert - variety of silica containing microcrystalline quartz taconite - a variety of chert containing magnetite and hematite; mined as a low-grade iron ore silica, silicon dioxide, silicon oxide - a white or colorless vitreous insoluble solid (SiO2); various forms occur widely in the earth's crust as quartz or cristobalite or tridymite or lechatelierite

Translations

chert

n (Min) → Kieselschiefer m, → Feuerstein m, → Hornstein m; (Build) → Gneiszuschlag(stoff) &, Feingranitzuschlag m (für Sichtbeton)