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Definition

Atoll: ring-shaped islands that nearly or entirely enclose a lagoon — are made of coral reefs.

Hawaiian Translation: Moku Kua’au


Example

Midway atoll

This photograph of Midway atoll in the Northwest Hawaiian Islands is one of 84 astronaut photographs that appear in the World Atlas of Coral Reefs, published by the University of California Press.

diagram of atoll formation

This is a diagam of the formation of an atoll.


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