An atoll is a ring-shaped coral reef that forms around a lagoon. Charles Darwin's theory of how atolls are formed as remnants of ocean volcanoes is generally considered fact.
No, the word atolls is the plural form for the singular noun atoll. Example:There are a number of atolls on the coast near my home.
Atolls are formed first as a reef that fringes a volcanic island. The two largest atolls are Suvadiva in the Maldives Island and Kwajalein in the Marshall Islands.
around submerged, extinct volcanoesaround submerget, exinctvolcanos
These atolls are both in the Marshall Islands.
They don't. Volcanoes rise from the bottom of the sea, and much later, coral might start living around the circular volcano and create an atoll eventually.
No. The Great Barrier Reef is not a single atoll, but atolls do form part of it. The Great Barrier Reef is a series of atolls, islands and reefs extending for a length of approximately 2300km.
On an island
Atoll. Atolls are oceanic reef formation, often having a characteristic ring-like shape surrounding a lagoon. Atolls are formed when coral reef grows around a volcanic island that later subsides into the ocean.
crustal sinking
crustal sinking
Atolls