Younger Dryas

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Proper noun

Younger Dryas

1. (geology) The last stage of the Pleistocene epoch, lasting from circa 12,900 to 11,700 years BP.
   • 2018, Tim Flannery, Europe: A Natural History, page 145:

     The International Union of Geological Sciences recognises the Pleistocene as ending 11,764 years ago, because that is when the last advance of the ice - known as the Younger Dryas - ended.