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[2] [3] Atolls are located in warm tropical or subtropical parts of the oceans and seas where corals can develop. Most of the approximately 440 atolls in the world are in the Pacific Ocean. Two different, well-cited models, the subsidence model and the antecedent karst model, have been used to explain the development of atolls. [4]
Download as PDF; Printable version; ... Atolls by sea or ocean (4 C) A. Atolls of Asia (8 C) D. Disputed atolls (22 P) O. Atolls of Oceania (7 C, 2 P) Pages in ...
The total surface area of the archipelago is about 750 km 2 (290 sq mi), scattered over 700,000 km 2 (270,000 sq mi) of the southern Pacific Ocean. List [61] Tuvalu: 9 9 Six atolls and 3 reef islands. List [62] United Kingdom: 6,346 129 Includes all offshore islands marked on Ordnance Survey maps. England, Scotland & Wales: 6289; Northern ...
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The three atolls are steep-to and each encloses a large deep lagoon. They are separated by deep passages two to three km (1.2–1.9 mi) wide. The atolls of the Indispensable Reef are aligned in a NW-SE direction: [1] North Reef is 18 km (11 mi) long, and up to 7 km (4.3 mi) wide. The rim of the atoll has two narrow openings in the north and ...
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The number of atolls in the Chagos Archipelago is given as four or five in most sources, plus two island groups and two single islands, mainly because it is not recognised that the Great Chagos Bank is a huge atoll structure (including those two island groups and two single islands), and because Blenheim Reef, which has islets or cays above or ...
Kiritimati (Christmas Island), a raised coral atoll in the Pacific Ocean. A raised coral atoll or uplifted coral atoll is an atoll that has been lifted high enough above sea level by tectonic forces, protecting it from scouring by storms and enabling soils and diverse – often endemic – species of flora and fauna to develop. [1]