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 …

Oct 19, 2023 · An atoll is a ring-shaped coral reef, island, or series of islets. The atoll surrounds a body of water called a lagoon.

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 …

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.

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

Dec 3, 2025 · An atoll is a unique island formation emerging from the deep ocean floor. These formations are ring-shaped coral reefs that partially or completely enclose a body of water.

When the island completely subsides beneath the water, it leaves a ring of growing coral with an open lagoon in its center, this is called an atoll. The process of atoll formation may take as long as 30 …

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.

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 …