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Ash Deposits and Ice

WAIS DIVIDE, ANTARCTICA-- Our primary goal here at WAIS Divide is to drill and collect ice cores and get it shipped back to the United States. Rarely do we see anything other than clear ice with some scratches and cracks, but around 1600 m deep we retrieved a core with a visible dark band in it. We think that this layer is a tephra layer, or a volcanic ash deposit!... {Read More »}