Coral Atoll
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GEOGRAPHY
Marine Geography
Coral Atoll
Atolls are living coral rings formed as volcanic islands sink beneath the ocean
5 Feb 2026
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What natural process primarily leads to the formation of a coral atoll?
Coral growth around a sinking volcanic island forming a ring-shaped reef
Volcanic eruptions creating ring-shaped islands from lava flows
Coral reefs forming only on flat ocean floors without any volcanic activity
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