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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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英文字典中文字典相关资料:

Chert - Wikipedia
Tripolitic chert (or tripoli) is a light-colored porous friable siliceous (largely chalcedonic) sedimentary rock, which results from the weathering (decalcification) of chert or siliceous limestone
Chert: Sedimentary Rock - Pictures, Definition, Formation
What is Chert? 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 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
How to Identify Chert - Geology In
Chert, a sedimentary rock primarily composed of microcrystalline quartz (silicon dioxide, SiO₂), is recognized for its durability and distinctive conchoidal fracture, properties historically crucial for tool-making
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 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
Chert Rock: Types, Formation and Comparison to Flint - Sandatlas
Chert is a hard and compact sedimentary rock made mostly of tiny quartz crystals It commonly occurs in carbonate rocks, either as nodules or as layered deposits known as bedded chert
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
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)
All About the Rock Called Chert - ThoughtCo
Chert is a sedimentary rock made of silica, mainly from the skeletons of tiny plankton This rock forms through slow transformations beginning with siliceous ooze going through lithification and diagenesis Chert is a tough rock that isn't transparent, often showing colors due to clay or organic matter

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