Rangiroa
January 27th 2016 Jan 22, Friday, Rangiroa
Rangiroa is an atoll; that is, a ring of land barely above sea level enclosing a lagoon. It is volcanic in origin, but the volcano is so ancient that it has been completely pounded down by the sea. All you see is a rim sticking up a few feet, and the inevitable coral reefs that grow when sunlight penetrates to a solid support. The ring is never entirely closed;
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