Hringrif Leiðsagnarval
Hringrif
kóraleyjarhitabeltishöfumkóralrifilægðsjávarlónfersktísaltsaltstöðuvatn
Hringrif
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Gervihnattamynd af Atafu í Kyrrahafinu.
Kort af Kwajalein hringrifinu
Hringrif eða baugeyjar eru lágreistar kóraleyjar sem finna má í hitabeltishöfum og eru myndaðar úr kóralrifi sem umlykur lægð. Lægð þessi getur verið hluti rísandi eyju, en oftast er hún sjávarlón, sjaldnar innilokað ferskt, ísalt, eða mjög salt stöðuvatn.
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- Hringrif
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