内容提示: AAtollsDavid HopleyCoastal and Marine Consultancies Pty Ltd,Townsville, QLD, AustraliaAtolls are coral reefs found in the open ocean consisting of anannular rim surrounding a central lagoon. There is a ge
around the Indonesian Islands, the Philippines, New Guinea, Fiji and most of the Caribbean Islands are there because a suitable substrate in shallow water existed on which they could initiate growth. In none of these areas are large land areas subsiding, not will these reefs ultimately become ...
The islands of the Maldives are all atolls, which are remnants of extinct volcanic islands. Once an island is formed and stops growing, the ocean goes to work eroding the island. In the end, all that is left is an island ring of former coral reef, with a lagoon of saltwater in the ...
The significance of coral microatolls as sea-level recorders was first recognized by Scoffin and Stod- dart (1978), and since then microatolls have become widely used in climate and oceanography studies and occasionally used in tectonic studies. Microatolls that are formed in radially growing ...
Coral reefs are natural structures formed from deposits of the calcium carbonate secretions of coral, a marine animal that lives in colonies. In general, coral reefs are grouped into one of three categories, atolls, barrier reefs, and fringing reefs. Atolls are usually easily distinguished because...