What is a popular model for the formation of an atoll?
A) a moderate-sized meteoroid forms a circular crater on the seafloor
B) a volcanic eruption forms a large circular caldera
C) a volcanic island forms and subsides
D) a barrier reef becomes buried by volcanic eruptions

Question

Quizplus · Accepted Answer

Atolls are formed from the subsidence of volcanic islands. As the volcanic island erodes and subsides, coral growth continues upward, eventually forming a ring-shaped reef known as an atoll.

What Is a Popular Model for the Formation of an Atoll