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6.3.3.3 Atoll

An atoll is a ring-like reef of low coral islands which enclose a central lagoon. The atoll is usually marked by isolated coral heads, and the central enclosed area is submerged, but covered with algal mud and coral sands.


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Formation of Atoll - Sinking Island
Formation of Atoll - Sinking Island
Gilluly, J., A. C. Waters, and A. O. Woodford.
Principles of Geology.
W. H. Freeman and Company, San Francisco, 1975.
Development of Atoll Reef  Atoll Glacier Formation  Formation of Atoll - Sinking Island  Formation of Atoll  Formation of Atoll  Formation of Atoll  Ailinginae atoll. Southwest corner from air, Marshall Islands. 

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