See Also: atoll(dictionary)
atoll(encyclopedia)
atoll(dictionary)
Palmyra Atoll map(tourism)
Johnston Atoll(tourism)
Palmyra Atoll(tourism)
Bikini Atoll(dictionary)
Johnston Atoll map(tourism)
Aldabra Atoll(tourism)
Palmyra Atoll travel(tourism)

atoll (sh)




Coral reef enclosing a lagoon.

Atolls consist of ribbons of reef that may not be circular but that are closed shapes, sometimes miles across, around a lagoon that may be 160 ft (50 m) deep or more. Most of the reef itself is usually below the water surface; around the rim along the top are usually low, flat islands or more continuous strips of low, flat land.