CORAL ATOLL   Coral atolls are the most unusual type of reef. 
 
Coral Atolls are surrounded only by water.
 
Coral Atolls started life as fringe reef
surrounding a volcanic island.
 
Sometimes Coral Atolls form into coral islands.
 
The Maldives islands are Coral Atolls.
 
Charles Darwin was the first person to
explain how Coral Atolls were formed.
 
An atoll is a ring of coral.     QUIZ HOME CRAFT