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There is indeed compelling evidence of a series of massive glacial surges at the end of the last Ice Age. These correlate with meltwater pulses and peaks of sea-level rise, recorded, for example, in 'drowned' reefs of from the Caribbean-Atlantic region near the island of Barbados. is an efficient tracker of rising sea-level because it is a light-loving coral that dies at depths greater than about 10 meters. The Barbados reefs were drowned three times at the end of the last Ice Age -- at approximately 14,000, 11,000 and 8000 years ago -- and so suddenly and deeply on each occasion that they now form three distinct steps, one for each flooding peak (rather than having crept towards shallower water as would have been the case with more gradual sea-level rises).