chert

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Chert - Wikipedia
Chert (/tʃɜːrt/) 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. en.wikipedia.org
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Chert - Geology - rocks and minerals - The University of Auckland
Chert is a sedimentary rock consisting almost entirely of silica (SiO 2 ), and can form in a variety of ways. rocksminerals.flexiblelearning.auckland.ac.nz
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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 (SiO2). geology.com
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chert
chert (tʃɜːt) Also 7–8 chirt. [App. a local term, which has been taken into geological use. Origin not ascertained. Prof. Skeat compares Kentish place-names like Brasted Chart; but this chart is explained by Parish and Shaw as ‘a rough common overrun with gorse, broom, bracken, etc.’, whence charty ... Oxford English Dictionary
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CHERT Definition & Meaning - Merriam-Webster
The meaning of CHERT is a rock resembling flint and consisting essentially of a large amount of fibrous chalcedony with smaller amounts of ... www.merriam-webster.com
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Chert as common as dirt in the Ozarks
Chert is a petrified limestone rock where the calcium carbonate is displaced with silicon dioxide. The limestone rocks found in the Ozarks formed in a shallow ... www.uaex.uada.edu
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Chert: Mineral information, data and localities.
Cherts are tough, compact rocks with low porosity that are composed mainly of microcrystalline quartz (<20 microns in diameter) and varying amounts of ... www.mindat.org
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Chert | Geology 1501 | ECU
Chert ; Origin, Chemical-Biochemical ; Texture, Nonclastic; Very fine-grained ; Composition, Silica or Microcrystalline Quartz ; Color, Tan to light gray. geology.ecu.edu
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Chert and flint | Mineral, Sedimentary Rock - Britannica
Chert is the second most abundant chemically precipitated rock after limestone. It occurs in beds and in nodules. Bedded chert consists of siliceous fossils ... www.britannica.com
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Chert FAQ - Golden Gate - National Park Service
Chert is a sedimentary rock rich in silica. Franciscan chert is formed from the tiny silica shells (0.5-1 mm) of marine plankton called Radiolaria. www.nps.gov
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What is CHERT ? (with examples) - YouTube
What is the Difference Between Agate, Jasper, Chalcedony, and Chert? #gems #science #crystals #rocks Mooney Fine Mineral www.youtube.com
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Rhynie chert
the Windyfield chert. Mycorrhizae are also found in the Rhynie chert. wikipedia.org
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Kalur Chert
The Kalur Chert is a geologic formation in Albania. It contains fossils dated to the late Bajocian to mid Oxfordian of the Jurassic. Vigla Formation References Geologic formations of Albania Jurassic System of Europe Bathonian Stage Bajocian Stage Callovian Stage Oxfordian Stage Chert wikipedia.org
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Gunflint chert
The Gunflint Chert is of paleontological significance, as it contains evidence of microbial life from the Paleoproterozoic. The Gunflint Chert is composed of biogenic stromatolites. wikipedia.org
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Penters Chert
The Penters Chert is a Devonian geologic formation in the Ozark Plateaus of Arkansas. wikipedia.org
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