Sampling Rock (IMAGE)

University of Washington

Sampling Rock

Caption

Jigjidsurengiin Batbaatar chisels rock from the surface of a boulder dropped by a glacier in the Gobi-Altai range in Mongolia. The elemental traces of exposure to cosmic rays show that this glacier reached its maximum size 7,500 years ago, much later than the last ice age.

Credit

Alan Gillespie/University of Washington

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