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The Allerød is a warm period that occurred during the last ice age, between approximately 12,000 and 11,500 years ago. This period was characterized by a significant, albeit temporary, warming trend in the Northern Hemisphere, particularly around the North Atlantic Ocean. Evidence for the Allerød comes from ice cores, particularly those from Greenland, as well as from lake levels in North America and Europe.123

The warming of the Allerød was followed by a return to cooler conditions, known as the Younger Dryas, before the onset of the current Holocene Epoch. The Allerød is considered part of the Bølling-Allerød interstadial, a phase of warming that interrupted the overall glacial conditions of the Pleistocene Epoch.24

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