Atoll
Coral Atoll
Ring-shaped coral reef, generally formed over a former oceanic volcano, frequently with small emerging islands (motus) over the rim, often enclosing a central lagoon possibly still containing one or a few emerging elevated islands.
Ring-shaped coral reef, generally formed over a former oceanic volcano, frequently with small emerging islands (motus) over the rim, often enclosing a central lagoon possibly still containing one or a few emerging elevated islands.
Wikidata
