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The atoll of Tetiʻaroa in French Polynesia. An atoll (/ ˈ æ t. ɒ l,-ɔː l,-oʊ l, ə ˈ t ɒ l,-ˈ t ɔː l,-ˈ t oʊ l /) [1] is a ring-shaped island, including a coral rim that encircles a lagoon. There may be coral islands or cays on the rim. [2] [3] Atolls are located in warm tropical or subtropical parts of the oceans and seas where ...
Atoll – Ring-shaped coral reef; Arch – Arch-shaped natural rock formation; Ayre – Shingle beaches in Orkney and Shetland; Barrier bar – Natural submerged sandbank that rises from a body of water to near the surface
Spur and groove formations are a geomorphic feature of many coral reefs.They are ridges of reef formed by coral ("spurs") separated by channels ("grooves") which often have sediment or rubble bed.
This glossary of geography terms is a list of definitions of terms and concepts used in geography and related fields, including Earth science, oceanography, cartography, and human geography, as well as those describing spatial dimension, topographical features, natural resources, and the collection, analysis, and visualization of geographic ...
Lagoons are commonly divided into coastal lagoons (or barrier lagoons) and atoll lagoons. They have also been identified as occurring on mixed-sand and gravel coastlines. There is an overlap between bodies of water classified as coastal lagoons and bodies of water classified as estuaries. Lagoons are common coastal features around many parts of ...
Raised coral atoll This page was last edited on 30 November 2020, at 02:37 (UTC). Text is available under the Creative Commons Attribution ...
The Indonesian Archipelago, located in Asia and Oceania, is the largest archipelago in the world. The Aegean Sea with its large number of islands is the origin of the term archipelago.
The value of terms such as "semi-atoll" and "pseudo-atoll" needs close examination and more rigorous definition before being generally accepted." H. Mergner yet states that micro-atolls classify as pseudo-atolls. Professor David R. Stoddart of Berkeley states an "almost-atoll" is an atoll with a central island of left over residue.