Most present atolls are on former ________ islands.
A) volcanic
B) granitic
C) karst
D) tombolo
E) barrier

Name: Most present atolls are on former ________ islands. A) volcanic B) granitic C) karst D) tombolo E) barrier
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Question

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Atolls are typically formed from the erosion of volcanic islands over a long period of time, where the island gradually subsides and its submerged edges form a ring-shaped coral reef surrounding a lagoon.

Most Present Atolls Are on Former ________ Islands