High School

Which of the following limestones form in a shallow-marine environment?

A. Oolitic Limestones
B. Fossiliferous Limestones
C. Crystalline Limestones
D. All of these

Answer :

Final answer:

Oolitic limestones form in a shallow-marine environment. They are composed of sand-sized, well-rounded carbonate particles called ooliths, which have concentric layers. Oolitic limestones are typically found in shallow, wave-agitated waters. The correct answer is A.

Explanation:

The correct answer is A. Oolitic Limestones. Oolitic limestones form in a shallow-marine environment. They are composed of sand-sized, well-rounded carbonate particles called ooliths, which have concentric layers.

Ooliths are formed in shallow, wave-agitated waters and they become cemented together to form oolitic limestone.

For example, in Figure 5.29, the geologists have identified oyster shells among large blocks on a beach. Oyster shells are common in shallow-marine environments and can be found in oolitic limestones. The correct answer is A.