How Are Atolls Formed?


Atolls are formed first as a reef that fringes a volcanic island. As the island sinks after the volcanic activity has stopped and the Earth crust has cooled, the reef continues to build upward, finally ending up as a ring-shaped structure. These ring-shaped islands or arc of islands are made almost entirely out of coral.
Q&A Related to "How Are Atolls Formed?"
Coral is primarily composed of calcium carbonate deposited by the decay of living creatures that spend their lives in and around the coral reef. A vast number of marine creatures
Coral reefs are formed when one coral stays plotted down in one area. After time, that coral dies, and another attaches to that dead one and lives there. This happens over and over
Growing Epsom salt crystals is a straightforward process that can be easily accomplished with a salt water solution and a bowl or other container. Rocks are placed in the containers
Warm, shallow seas.
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