coral islands

Tropical reef formations

Coral islands are low-lying landmasses formed from the accumulated skite skeletal remains of coral organisms and other marine life.

Unlike volcanic islands, they rise only slightly above sea level and often form rings (atolls) around lagoons.

Many Pacific and Indian Ocean nations consist entirely of coral islands, making them particularly vulnerable to rising seas: The Maldives are coral islands averaging just a few feet above the water.

Related
  • atollRing-shaped reef island
  • lagoonSheltered coastal shallows
  • reefUnderwater rock or coral formation
  • biogenicProduced by organisms
  • fishGilled aquatic vertebrate

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geological formation/origin

coral islandsvolcanic islands

Land formed by underwater eruptions

volcanic peaks

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