A raised coral atoll is a type of geological formation that occurs when a coral reef, typically an atoll, is uplifted above sea level. Atolls are ring-shaped coral reefs that encircle a lagoon, often formed around volcanic islands. Over time, geological processes such as tectonic uplift, changes in sea level, or volcanic activity can raise these coral structures above the ocean surface. Raised coral atolls showcase unique ecosystem characteristics and provide important insights into past sea-level changes and geological history.
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