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Atoll islands are low lying, with their elevations less than 5 metres (16 ft). Measured by total area, Lifou (1,146 km 2, 442 sq mi) is the largest raised coral atoll of the world, followed by Rennell Island (660 km 2, 250 sq mi). [10] More sources, however, list Kiritimati as the largest atoll
Canton Island typifies the isolated coral atolls dotting the Pacific Ocean. The Structure and Distribution of Coral Reefs, Being the first part of the geology of the voyage of the Beagle, under the command of Capt. Fitzroy, R.N. during the years 1832 to 1836, was published in 1842 as Charles Darwin's first monograph, and set out his theory of the formation of coral reefs and atolls.
The main habitat types found in the reserve are coral reefs, islands, sea grass beds and mangroves. Coral reefs are the most important habitat type in terms of area as well as biodiversity. Maldivian coral reefs are home to the richest diversity in the region and are the seventh largest in the world, accounting for 5% of the world's reef area.
Pikelot Atoll is an uninhabited coral island about 415 miles southeast of Guam that is occasionally visited by fishing boats. An expedition of Micronesian sailors found an abandoned makeshift ...
The world's northernmost individual coral reef is located in the Finlayson Channel, in the inside passage of British Columbia, Canada. [72] The world's southernmost coral reef is at Lord Howe Island, in the Pacific Ocean off the east coast of Australia.
The atoll is the largest raised coral reef in the world with an elevation of 8 metres (26 ft); and the second-largest atoll in the world after Kiritimati Atoll. [18] It lies at 9°24′S 46°22′E / 9.400°S 46.367°E / -9.400; 46.367 and belongs to the Aldabra Group , one of the island groups of the Outer Islands of the Seychelles ...
The people of the Carteret are being called the world's first environmental refugees. [19] In 2017 the Finnish Embassy in Canberra, which is involved in an aid project, reported that despite the relocation efforts, there are more people than ever living at the atoll, and the atoll has practically doubled its population. [20]
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]