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Coral caves: vestiges of Rurutu's strange story
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Millions of years ago, the undersea volcano Mac Donald propelled the island of Rurutu out of the water. Then, the ladder slowly collapsed. This allowed the emergence of a coral reef around it. This was before a second volcanic eruption that raised the island 80 above the sea level. Its coral reef then transformed in coastal cliffs when were dug caves with astonishing limestone caves.
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