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How is a coral Atoll formed?

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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 volcano.
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How is coral formed?

The skeletons of dead corals are the foundation upon which layerer upon layer of successively younger animals attach themselves. The coral animal, or polyp, is colulmn shaped.

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),

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

What is coral and how does it form?

A Substance, as harder as stone, that is formed by the skeletons of tiny sea animals is called Corals.  The tiny sea animals like sea anemone secrete calcium carbonate from

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.

How can coral atoll be attached to ocean floor when coral cannot live or form reefs in the deep ocean?

                Coral atoll are tiny sea animals that live in shallow water, but when reefs form the new coral grow over the skeleton of the ol

Why was coral atoll chosen for the nuclear tests?

The U.S. used the pacific atolls because they were isolated from  large population centers and because the Marshal Islands (where  many of these atolls were) were entirely u

What is an Atoll formed around?

A long extinct oceanic volcano, when the volcano died the sea floorunder it slowly dropper causing the volcano to sink beneath theocean. As it sank a ring shaped coral reef fo