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An ice core
Date Taken:
December 18, 2010
Photograph By:
Heidi Roop, NSF

The dark band in this ice core from the West Antarctic Ice Sheet Divide (WAIS Divide) is a layer of volcanic ash that settled on the ice sheet approximately 21,000 years ago.

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Curator: Antarctic Support Contract, Communications   |    NSF Point of Contact: Peter West, Office of Polar Programs