Chalk is a prime example of sediment that is closely related to a change in the kind of __________ organism that secretes large volumes of __________ within a(n) "__________."

Question

Quizplus · Accepted Answer

Chalk is primarily composed of the calcium carbonate mineral calcite, which is secreted by marine organisms such as coccolithophores, foraminifera, and calcareous algae. These organisms thrived during the Mesozoic era, when the oceans were a "calcite sea" with higher saturation levels of calcium carbonate, making it easier for these organisms to form their skeletal structures. Therefore, the correct choice is C, marine organisms secreting large volumes of calcite within a calcite sea.

Chalk Is a Prime Example of Sediment That Is Closely