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 ?
VMS deposits are commonly associated with regionally developed iron- and (or) manganese-rich metalliferous sediment and chert developed at the same time-stratigraphic horizon as the massive sulfide deposits.
The samples that Westall and her team studied were found in the Josefsdal Chert volcanic deposit, which is located in the Makhonjwa Mountains in north-eastern (https://www.ibtimes.com/man-allegedly-killed-girlfriend-baby-burnt-their-bodies-2791571) South Africa .
Archeologists have found tools made of obsidian (volcanic glass) and chert (fine-grained sedimentary rock) dating back to the Neolithic Period some 5,000 years ago in a coastal area in what is now Misamis Oriental province.
The sequence boundary is marked from the laterite beds, while maximum flooding surface are marked from the chert beds.
The stone is chert, a flint-like substance used to chip small razor sharp blades off (microliths) which were used by our ancient ancestors to build composite tools to hunt with.
"101 American Fossil Sites You've Gotta See " also features a short history of life on Earth, from microbes in 3-billion-year-old chert to massive mammals of the Pleistocene ice ages.
Tools made of bone and chert became more prevalent, such as scrapers, drills and tools for sewing and weaving.
Most of the material in and around the hearths is lithic, consisting of flakes and scrapers in local stone, as well as bifaces, points, knives, and various tools in grey-green chert, quartz, quartzite, and Ramah quartzite (Robbins, 1989:10; Tuck, 2005: 31-32).
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"The stone tools uncovered at Llanfaethlu include chert and flint, which are fine grained silica rich, glass like stones that can be fashioned into a variety of tools, for example knives, scrappers to prepare animal hides, and axes."
Along the way, these migrants availed themselves of the many outcroppings of chert, a form of flint well suited for projectile points.
These analyses are ongoing, to date results indicate people occupying the site brought a stone toolkit that included non-local Tallahatta Sandstone and chert. These curated tools were used at the site, resharpened, and discarded there.