WEBChert (/ ˈ tʃ ɜːr t /) is a hard, fine-grained sedimentary rock composed of microcrystalline or cryptocrystalline quartz, the mineral form of silicon dioxide (SiO 2). Chert is characteristically of biological origin, but may also occur inorganically as a chemical precipitate or a diagenetic replacement, as in petrified wood .
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Chert: Sedimentary Rock - Pictures, Definition, Formation
WEBWhat 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.
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Chert: Identification, Pictures & Info for Rockhounds
WEBChert 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.
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Chert Rock | Types, Properties, Composition, Formation, Uses
WEBApr 23, 2023 · 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.
WEBNov 6, 2019 · Chert is the name for a widespread type of sedimentary rock that is made of silica (silicon dioxide or SiO 2). The most familiar silica mineral is quartz in microscopic or even invisible crystals; that is, microcrystalline or cryptocrystalline quartz.
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Chert and flint | Mineral, Sedimentary Rock | Britannica
WEBChert 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.
WEBChert is a hard and compact sedimentary rock, consisting dominantly of very small quartz crystals. It is a common rock type which occurs mostly in carbonate rocks either in nodular form or in layers (bedded chert).
WEBAug 28, 2022 · Chert is a fine-grained (microcrystalline) variety of quartz. It is also the name given to rock composed primarily of fine-grained quartz. So, the name is used in two ways. Chert (the silica mineral kind) may be massive or layered. It is often in nodules or concretions in limestone.
WEBChert, also known as flint, is a silica-rich sedimentary rock. Chert is very hard and its conchoidal fractures can leave sharp edges which do not dull.
WEBChapter 6. OTHER SEDIMENTARY ROCKS: CHERT AND EVAPORITES. 1. CHERT. 1.1 Introduction. 1.1.1 Chert is the general term for very fine-grained and nonporous sedimentary rocks that consist mostly or entirely of silica, in the form of either amorphous silica or microcrystalline quartz presumably derived from recrystallization of …
