Pseudo-atoll Pseudo-atoll A pseudo-atoll, like an atoll, is an island that encircles a lagoon, either partially or completely. A pseudo-atoll differs from an atoll as established by several authorities, such as how it is formed (not by subsidence, nor by coral). It is considered a preferable term to "near-atoll". There is a need for rigorous definition of "pseudo-atoll" before it can be accepted as a general term. Alexander Agassiz gave the term pseudo-atoll to "any ring-shaped reefs not formed as a result of subsidence". while Norman D. Newell and J. Keith Rigby called such reefs non-coral. and "We conclude that almost-atoll
Providence Atoll Providence Atoll The Providence Atoll is part of the Farquhar Group of islands in the Seychelles that are part of the Outer Islands, with a distance of southwest of the capital, Victoria, on Mahé Island. The atoll was discovered in 1501 by Joao da Nova, a Portuguese explorer. The atoll was under British control until 1976 when they became part of Seychelles at the time of independence. Providence got its name after an event which happened in 1763. A French frigate, ”Heureuse” , was stranded on its reef, 705 km from Victoria near the northern end of the atoll. The