Chert is widely distributed and can be found in carbonate rocks of all ages,. Chert occurs in carbonate rocks that are greensand, limestone, chalk, and dolostone formations as exchange mineral, where it is formed as a result of some type of diagenesis. Where chert occurs in chalk or marl, it is usually called flint.
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Under the right palaeoceanographic conditions, microfossils have also been deposited in such vast numbers that they are the primary material for the accumulation of some extremely.
Chalk is available in grey, white, yellow colors whereas, chert is.
The term flint is widely used as a synonym for chert and describes the black nodular variety which is commonly found in chalk. [4] chert is typically composed of the petrified remains of siliceous ooze, the biogenic sediment that covers large areas of the deep ocean. In some cases, chert appears in rhythmic. As early as 8000 bc, the people of what are now england and france dug shafts up to 300 feet deep into layers of soft chalk to mine chert nodules.
Its darker color comes from the inclusion of. When we have to compare chalk vs chert, the texture, color and appearance plays an important role in determining the type of rock. Chert is often found as nodules in carbonate rocks.
