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Drowned shelf edge reefs in the Great Barrier Reef |
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Drowned (or submerged) reefs are tropical coral reefs that grew during previous lower sea-levels, and they now lie in depths greater than those typically associated with the vigorous growth of modern coral reefs. Studies around the world have found that drowned reefs are very important as records of global sea-level rise and climate change, as the corals that grew during these earlier periods are now preserved in the limestone rock of the drowned reefs. |
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