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.
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Chert
Form of rock
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Chert is a hard, fine-grained sedimentary rock composed of microcrystalline or cryptocrystalline quartz, the mineral form of silicon dioxide. Chert is characteristically of biological origin, but may also occur inorganically as a chemical... Wikipedia
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Chert (/ˈtʃɜːrt/) is a hard, fine-grained sedimentary rock composed of microcrystalline or cryptocrystalline quartz, the mineral form of silicon dioxide (SiO2).
Chert is a sedimentary rock composed of microcrystallite quartz. It is a tough rock that ancient people used to make tools and weapons. It can be broken to ...
A dense, hard, fine grained, siliceous-rock with low porosity. Cherts are tough, compact rocks with low porosity that are composed mainly of microcrystalline ...
Chert and flint occur as individual nodules or layers of nodules in limestone or dolomite; they are common in rocks of all ages (notably in the Cretaceous chalk ...
Feb 28, 2015 · 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 ...
Chert, 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 easily.