An atoll is a ring-shaped coral reef and features a lagoon. Some examples of atolls are the Bikini atoll, Tubbataha Reef and Lighthouse Reef.
Atolls are typically found in warm tropical and subtropical oceans, particularly in the Pacific and Indian Oceans. They are commonly found in areas with low-lying coral reef islands surrounding a central lagoon. Some well-known atolls include the Maldives, Tuamotu Archipelago, and Marshall Islands.
ATOLL
atoll
An atoll is an island of coral that partially or completely surrounds a lagoon.
A coral atoll.
It is called Green Island.
An atoll is a coral island that encircles a lagoon partially or completely. Yaren, is a district and constituency of the Pacific nation of Nauru. It is the capital of Nauru. Yaren does not have an atoll, but instead is a part of an island in Micronesia.
The largest coral atoll in the world is Kwajalein Atoll in the Marshall Islands, covering an area of around 6,600 square kilometers. It consists of 97 islets around a lagoon that is 16-97 km wide.
atoll
The US tested on Bikini atoll, Eniwetok atoll, and launched some high altitude tests from Johnston island on rockets. The UK tested on Christmas island.
Bikini atoll, USEniwetok atoll, USChristmas Island, UK