Difference between revisions of "Atoll"
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| − | + | An '''atoll''' is a circular ring of [[coral]] that encloses a shallow [[lagoon]], it is normaly covered by a thin layer of soil. Generally, only [[tropical plant]]s, like [[palm tree]]s, can thrive on an atoll. In many cases, atolls are built up on the [[crater]] of a [[volcano]] that has sunk below the sea. On the side of the atoll that the wind usually blows against, there is a break in the circle so the pool has an opening into the surrounding sea. | |
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| + | [[category:Geography]] | ||
Revision as of 02:51, May 25, 2007
An atoll is a circular ring of coral that encloses a shallow lagoon, it is normaly covered by a thin layer of soil. Generally, only tropical plants, like palm trees, can thrive on an atoll. In many cases, atolls are built up on the crater of a volcano that has sunk below the sea. On the side of the atoll that the wind usually blows against, there is a break in the circle so the pool has an opening into the surrounding sea.
