chert


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Related to chert: Dolostone, micrite

chert

 (chûrt)
n.
1. A variety of silica that contains microcrystalline quartz.
2. A siliceous rock of chalcedonic or opaline silica occurring in limestone.

[Origin unknown.]

chert′y adj.

chert

(tʃɜːt)
n
(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
[C17: of obscure origin]
ˈcherty adj

chert

(tʃɜrt)

n.
a compact rock consisting essentially of microcrystalline quartz.
[1670–80; orig. uncertain]
chert′y, adj.

chert

(chûrt)
A hard, brittle, reddish-brown to green sedimentary rock consisting of very small crystals of quartz.

chert

A type of sedimentary rock made up of of tiny quartz crystals.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.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)
References in periodicals archive ?
Reconnaissance structural mapping and limited geochemical sampling of the northern portion of the claim block conducted by Geoinformatics has indicated fracture zones in upper plate, Ordovician Valmy argillite and chert, and in lower plate carbonate rocks.
Various fine-grained cherts, including fine red, white and brown, and medium grey chert, were used for flake tools while coarse-grained material like sandstone was often modified into chopping tools.
In addition a chert exhalite containing chalcopyrite was intersected in the volcanics adjacent to the gold zone which is generally located near a basalt-rhyolite contact.
Yombon's role as a source of high-grade chert is evident in layers of freshly quarried stone and primary knapping debris within the Holocene and Pleistocene layers (Pavlides 1993; Pavlides & Gosden in press).
Second, the manufacture of a disproportionately high number of thumbnail scrapers from chert, a high-quality raw material with excellent flaking properties, in eastern southwest Tasmanian sites (e.
This discovery, located in southwestern Pennsylvania in Indiana County, was drilled to a total depth of 8,427 feet into an untested fault block in a producing Chert and Oriskany field.
Coincident geophysical anomalies and geology indicate the zone is underlain by felsic volcanics and volcanic exhalative sediments, containing chert, magnetite and possibly sulphides.
Strong argillic and hematitic alteration was observed at approximately 845 feet when the hole passed from upper-plate chert into carbonate rocks presumed to be part of the lower plate assemblage.
Hoffman, Chief Operating Officer of the Company, this pressure indicates the presence of a new reservoir in the Huntersville Chert formation in the field.
Known gold mineralization occurs on the property along the thrust contact between the Slaven Chert and the over thrust Valmy Formation.