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 generalpresumption that atolls have volcanic foundations and some425 have been recognized...
Miyaru Kandu.Continuing south, we headed to Vaavu Atoll to a site called Miyaru Kandu. 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...
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...
Cyclic steps are formed by turbidity currents that can be induced by a wide range of natural processes, including earthquakes, tsunamis, surface waves and storms, wind-driven currents, internal waves and tides, and mass wasting. Turbidity currents can transport sediment over distances > 500 km (...
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...