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See all on WikipediaChert - Wikipedia
Chert is a hard, fine-grained sedimentary rock composed of microcrystalline or cryptocrystalline quartz, the mineral form of silicon dioxide (SiO2). Chert is characteristically of biological origin, but may also occur inorganically as a chemical precipitate or a diagenetic replacement, as in petrified wood. … See more
In petrology, the term "chert" refers generally to all chemically precipitated sedimentary rocks composed primarily of microcrystalline, cryptocrystalline and microfibrous silica. Most cherts are nearly pure silica, with … See more
The cryptocrystalline nature of chert, combined with its above average ability to resist weathering, recrystallization and metamorphism has made it an ideal rock for preservation of … See more
There are numerous varieties of chert, classified based on their visible, microscopic and physical characteristics. Examples are: See more
• Photo & note re: Fig Tree Formation
• Microphotographs of Fig Tree fossils
• Schopf, J.W. (1999) Cradle of Life: The Discovery of Earth's Earliest Fossils, Princeton University Press, 336 p. ISBN 0-691-00230-4 See more
• Petrology – Branch of geology that studies the formation, composition, distribution and structure of rocks
• Archaeology – Study of human activity via material culture See moreWikipedia text under CC-BY-SA license Chert Rock | Types, Properties, Composition, …
Apr 23, 2023 — Chert is a fine-grained sedimentary rock composed of quartz (SiO2) that is microcrystalline or cryptocrystalline quartz. It is usually organic …
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Chert - Simple English Wikipedia, the free encyclopedia
Chert is a type of rock that includes flint and agate. It sometimes has fossils in it, usually shells. It is a sedimentary rock, and it is very hard. It is made from quartz. People used chert to make …
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Gunflint chert - Wikipedia
The Gunflint chert (1.88 Ga ) is a sequence of banded iron formation rocks that are exposed in the Gunflint Range of northern Minnesota and northwestern Ontario along the north shore of Lake Superior. 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. At the time of its discovery in the 1950s, it was the earliest form of life discovered and described in scientifi…
Wikipedia · Text under CC-BY-SA license- Estimated Reading Time: 10 mins
Chert - New World Encyclopedia
Chert is a fine-grained, silica-rich, microcrystalline, cryptocrystalline or microfibrous sedimentary rock that may contain small fossils.
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 …
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Chert: Sedimentary Rock - Pictures, Definition, …
Chert is a rock composed of microcrystalline quartz, often with colorful inclusions. It was used for tools and weapons by early people and has various applications today.
All About the Rock Called Chert - ThoughtCo
Nov 6, 2019 — Chert is a sedimentary rock composed of silica in microcrystalline or cryptocrystalline form, derived from siliceous ooze of plankton tests. Learn how chert is made, what it looks like, and what special cherts exist.
Chert | Natural Atlas
Chert ( ) is a hard, fine-grained sedimentary rock composed of microcrystalline or cryptocrystalline quartz, the mineral form of silicon dioxide (SiO2). Chert is characteristically of …
Chert - HyperPhysics
Chert. Chert is a sedimentary rock in the class known as chemical sedimentary rocks. It is composed of microcrystalline quartz. Chert is very hard and compact. A number of other rock …
Radiolarite - Wikipedia
Radiolarite is a siliceous, comparatively hard, fine-grained, chert -like, and homogeneous sedimentary rock that is composed predominantly of the microscopic remains of radiolarians. This term is also used for indurated …
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, …
History and contemporary significance of the Rhynie cherts—our …
Dec 18, 2017 — The Rhynie chert provides remarkable insights into the structure and interactions of early terrestrial communities, and it has a significant role to play in developing our …
Chert's Timeless Appeal: How It Shaped History and Modern Uses
Sep 8, 2023 — Chert is a hard, fine-grained sedimentary rock that has been used for centuries as a tool for cutting and shaping other materials. Composed primarily of microcrystalline or …
Chert - Presidio of San Francisco (U.S. National Park Service)
Feb 28, 2015 — In the Franciscan Complex, chert is a silica-rich rock formed from the altered shells of microscopic radiolaria, which slowly rained down onto the ocean bottom. Bedded …
Mill Creek chert - Wikipedia
Mill Creek chert is a type of chert found in Southern Illinois and heavily exploited by members of the Mississippian culture (800 to 1600 CE). [1] Artifacts made from this material are found in …
Chert
Chert (pronounced /ˈtʃɝt/) is a fine-grained silica-rich cryptocrystalline sedimentary rock that may contain small fossils. It varies greatly in color from white to black, but most often manifests as …
Chert - Wikiwand / articles
Chert is a hard, fine-grained sedimentary rock composed of microcrystalline or cryptocrystalline quartz, the mineral form of silicon dioxide (SiO2). Chert is characteristically of biological origin, …
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 cryptocrystalline quartz and amorphous silica.
What is the Rhynie Chert? | School of Geosciences | The …
The Rhynie cherts are part of the surface expression of an Early Devonian precious metal-bearing (contains minor gold) hot-spring system. This is the oldest hot spring system known …
Pilbara Craton - Wikipedia
The Pilbara Craton is an old and stable part of the continental lithosphere located in the Pilbara region of Western Australia. The Pilbara Craton is one of only two pristine Archaean 3.8–2.7 …
Chert - Vikipediya
Chert Ispaniyaning Valensiya mintaqasida joylashgan munisipalitetdir. Castellón provinsiyasi tarkibiga kiradi. Maydoni — 82,5 km 2. Aholisi — 897 kishi (2010). Havolalar. Rasmiy sayti …
Category:Chert - Wikipedia
Categories: Sedimentary rocks. Quartz varieties. Hidden category: Commons category link is on Wikidata.
Rhynie chert - Wikipedia
The Rhynie chert is a Lower Devonian [1] sedimentary deposit exhibiting extraordinary fossil detail or completeness (a Lagerstätte). [2] It is exposed near the village of Rhynie, …
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