Cemented shells of marine organisms form which kind of sedimentary rock?

Question

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Cemented shells of marine organisms are a common example of a biochemical sedimentary rock. These sediments consist primarily of organic matter that has been lithified by the slow accumulation of mineral-rich material in marine environments. Over time, this material becomes compacted and cemented into rock, creating layers of organic sedimentary rock such as limestone or chalk.

Cemented Shells of Marine Organisms Form Which Kind of Sedimentary