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chert 音标拼音: [tʃ'ɚt]

XDict

n. 黑矽石,角岩

PyDict

黑矽石,角岩

WordNet (r) 3.0 (2006) (WordNet)

chert
n 1: variety of silica containing microcrystalline quartz

The Collaborative International Dictionary of English v.0.48 (gcide)

Hornstone \Horn"stone`\, n. (Min.)
A siliceous stone, a variety of quartz, closely resembling
flint, but more brittle; -- called also {chert}.
[1913 Webster]

Chert \Chert\ (ch[~e]rt), n. [Ir. ceart stone, perh. akin to E.
crag.] (Min.)
An impure, massive, flintlike quartz or hornstone, of a dull
color.
[1913 Webster]

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Chert - Wikipedia
Chert ( tʃ ɜːr t ) is a hard, fine-grained sedimentary rock composed of microcrystalline or cryptocrystalline quartz, [1] the mineral form of silicon dioxide (SiO 2) [2] Chert is characteristically of biological origin, but may also occur inorganically as a chemical precipitate or a diagenetic replacement, as in petrified wood [3]
Chert Rock | Types, Properties, Composition, Formation, Uses
Chert is a fine-grained sedimentary rock composed of quartz (SiO2) that is microcrystalline or cryptocrystalline quartz It is usually organic rock but also occur inorganically as a chemical precipitate or a diagenetic replacement It occurs as nodules, concretionary masses, and as layered deposits
Chert: Sedimentary Rock - Pictures, Definition, Formation
Chert is a sedimentary rock composed of microcrystalline or cryptocrystalline quartz, the mineral form of silicon dioxide (SiO 2) It occurs as nodules, concretionary masses, and as layered deposits Chert breaks with a conchoidal fracture, often producing very sharp edges
Chert: Identification, Pictures Info for Rockhounds
Chert is a biochemical sedimentary rock made from microcrystalline quartz It is very hard – registering a 7 on the Mohs hardness scale, and displays conchoidal fracturing Chert can almost any color, but is usually gray, brown, red, or green It has many subvarieties including flint, jasper, agate, and onyx
Chert: Formation, Types, Uses, and Care for this Sedimentary Rock
Explore the world of chert, a cryptocrystalline quartz rock valued for its historical significance in tool-making and its modern uses in construction, jewelry, and decorative arts Learn about its formation, types, and care in this comprehensive guide
Chert and flint | Mineral, Sedimentary Rock | Britannica
chert and flint, very fine-grained quartz (q v ), a silica mineral with minor impurities Several varieties are included under the general term chert: jasper, chalcedony, agate (qq v ), flint, porcelanite, and novaculite Flint is gray to black and nearly opaque (translucent brown in thin splinters) because of included carbonaceous matter
Chert: Mineral information, data and localities. - mindat. org
Cherts are tough, compact rocks with low porosity that are composed mainly of microcrystalline quartz (<20 microns in diameter) and varying amounts of impurities (Folk et al 1952; Smith 1960)
Siliceous Rocks – Geology is the Way
Siliceous rocks are sedimentary rocks that consist of SiO 2, either in the form of amorphous silica (opal) or microcrystalline, cryptocrystalline quartz or chalcedony These rocks are generally referred to as cherts
Geology - rocks and minerals - University of Auckland
Chert is a sedimentary rock consisting almost entirely of silica (SiO 2), and can form in a variety of ways Biochemical chert is formed when the siliceous skeletons of marine plankton are dissolved during diagenesis, with silica being precipitated from the resulting solution
7. 4. 7: Chert - Geosciences LibreTexts
Chert (the silica mineral kind) may be massive or layered It is often in nodules or concretions in limestone Some chert forms by recrystallization of amorphous silica

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