An atoll (/ ˈæt.ɒl, - ɔːl, - oʊl, əˈtɒl, - ˈtɔːl, - ˈtoʊl /) [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 …

atoll, coral reef enclosing a lagoon. Atolls consist of ribbons of reef that may not always be circular but whose broad configuration is a closed shape up to dozens of kilometres across, enclosing a lagoon …

Mar 19, 2025 · An atoll is a ring of coral that originally grew completely around the shoreline of an island, and which continued to grow upward on top of itself as the island subsided or eroded away.

May 10, 2025 · An atoll stands as one of Earth’s most remarkable natural formations—a ring-shaped coral reef encircling a lagoon where once stood a volcanic island. These living geological wonders …

An atoll is a ring-shaped coral reef, island, or series of islets. The atoll surrounds a body of water called a lagoon.

For reef scientists, atolls are broadly defined as large, ring-shaped coral reefs that surround a central lagoon.

The meaning of ATOLL is a coral island consisting of a reef surrounding a lagoon. Did you know?

An atoll is a coral reef enclosing a lagoon, characterized by a ring or horseshoe shape. The coral rim may be elliptical or angular, but consistently forms a closed shape.

Aug 12, 2024 · The result is an atoll, a circular or horseshoe-shaped coral reef that encircles a lagoon partially or fully. The coral reef and the lagoon together create a unique ecosystem that supports a …

Apr 17, 2019 · An atoll is a type of coral reef with a coral rim that partially or completely surrounds a water body known as a lagoon. It is usually formed from a fringing reef around a volcanic island.