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What is an atoll formed from?

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An atoll is formed from a coral reef and sometimes receding land or a volcanic structure.
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What are atolls?

Atoll . An atoll is a type of coral reef, shaped like a ring, that surrounds a lagoon. .

What is an atoll?

An island of coral that encircles a lagoon partly or completely.

What is the biggest atoll?

  In most cases, the land area of an atoll is very small in comparison to the total area. Lifou (land area 1146 km²) is the largest raised coral atoll of the world. Lif

How is a coral Atoll formed?

A volcanic island or underwater mountain forms via volcanic activity. This allows a surface near the water surface for corals to attach too. The corals form a ring around the

How do atolls form?

an atoll is formed first as a reef that fringes a volcanic island.   As the island sinks(after the volcanic activity has ceased and the crust has cooled, becoming denser),

What is Atole?

According to the Food Lover's Companion, atole (which is pronounced ah-TOH-leh) is "a very thick beverage that's popular in Mexico http://www.answers.com/topic/mexico-country-

How does an atoll form?

An atoll is formed first as a reef that fringes a volcanic island. As the island sinks (after the volcanic activity has ceased and the crust has cooled, becoming denser), th

Atolls form around?

An atoll is a ring-shaped coral reef that forms around a lagoon.  Charles Darwin's theory of how atolls are formed as remnants of  ocean volcanoes is generally considered fa

Where are atolls?

  Small clusters of islands, generally they have little elevation above sea-level.

Where do atolls form?

Atolls are formed first as a reef that fringes a volcanic island.  The two largest atolls are Suvadiva in the Maldives Island and  Kwajalein in the Marshall Islands.

How do coral atolls form volcanoes?

They don't. Volcanoes rise from the bottom of the sea, and much later, coral might start living around the circular volcano and create an atoll eventually.