chert

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Related to Radiolarite: radiolarian 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.

[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 ?
The high Zagros unit (or Crush Zone) has three separate subunits, which consists of the Biston limestone (Upper Cretaceous-Lower Triassic), the Kermanshah ophiolite, and the Bakhtaran radiolarite.
This radiolarite unit has the maximum volume of the rocks of the Noorabad ophiolitic compelex and has expanded from east of Noorabad to Kermanshah that has green to reddish brown colors.
The nappe was emplaced after Cenomanian, the age of the youngest dated radiolarite in the underlying sediments (DeWever et al.
The main reason was funded on the previously mentioned "Steinmann's trinity", in which a radiolarite is deposited on a basaltic basement, and therefore, the radiolarites must be younger than the magmatic rocks.
The association of serpentinite, diabase, and radiolarite led to the terra "Steinmann's trinity", which then spread through the literature.
Originally used to describe serpentinites, the term ophiolite progressively evolved to designate a field association (rock clan) of peridotites, gabbros, and radiolarites.
Some analogies can be found in Alpine deposits related to radiolarite outcrops such as Parsettens and Falotta or Scerscen which, although smaller, developed in a similar way and have approximately the same age.
Calcite is extremely common in cavities in basalt, in fractures in serpentinite, in fractures and cavities in the Calpionella limestone, and in veins in radiolarite.
These materials are mostly lime, plutonic and radiolarite.
Due to the material of the sediments stones and the source of them, they include the lime and radiolarite stones (2).
2] and includes Serpentinized Pridotites Harzburgite, micro-gabbro dykes, listvenite dykes, sheeted dykes, pillow lavas, metamorphic rocks, calcareous schists, and upper cretaceous radiolarite cherts.
The second category includes the volcanic--sedimentary rocks of lava type, radiolarites, pelagic lime stones, flysch and turbidities that are belong to a time span from upper Triassic to upper Cretaceous and have been formed after Pridotites.