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
Alif Alif Atoll India. The island is linked to Male by seaplane services. Alif Alif Atoll Alif Alif Atoll (also known as Northern Ari Atoll or Ari Atholhu Uthuruburi) is an administrative division of the Maldives. It was created on March 1, 1984 combining northern section of Ari Atoll, the small Rasdhukuramathi Atoll, and the isolated island of Thoddoo. Many of the islands in this atoll have been inhabited since ancient times and have archaeological remains from the Maldivian Buddhist period. The separation of Ari Atoll (formerly Alifu Atoll) into a Northern and a Southern section has formed the two most recent administrative