Sampling Rock (IMAGE)
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
Usage Restrictions
With credit
License
Licensed content