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Flint is a microcrystalline rock made of silica and is considered to have begun forming soon after the deposition of Chalk. The silica replaces the original Chalk carbonate grain by grain. The carbonate has to be dissolved with silica precipitated in its place.
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Sep 15, 2023 · Flint, sometimes interchangeably referred to as chert, is a type of cryptocrystalline or microcrystalline quartz that typically forms in sedimentary rocks. It is known for its conchoidal fracture, which means it breaks with smooth, curved surfaces, creating sharp edges.
Jul 17, 2020 · How has flint formed? Where has all the silica come from? And what controls the conditions that allow individual flint bands to be correlated over very long distances?
Short answer: Flint was formed in chalk, after it was deposited on the seabed as a chalky ooze, but before it was compressed into chalk rock. Silica, which was dissolved in sea water, precipitated within permeable pathways in this sediment.
Flint is a very peculiar rock. It looks as though it is the product of a volcano and has hardened from a molten state but it has, in fact, been formed entirely by a cold process beneath an ancient sea floor. Flint was formed in soft, limy mud on the floor of the Chalk Sea some 80 million years ago. It is made of quartz, or silica, which came ...
Flint, occasionally flintstone, is a sedimentary cryptocrystalline form of the mineral quartz, [1][2] categorized as the variety of chert that occurs in chalk or marly limestone. Historically, flint was widely used to make stone tools and start fires.
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Flint is a ubiquitous sedimentary crypto-crystalline form of quartz. It is found across the world, in regions that have sedimentary rocks, such as chalks and limestones.
