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Paleo Slide Set: The Ice Ages
Fjord, Baffin East Coast Mountains, Nunavut, Canada.
U-shaped valleys were another observation that could be explained by the ice-age theory. Scientists knew that rivers carved V-shaped valleys, but not U-shaped valleys, which are found only in alpine regions or high latitudes where glacial ice is formed.

Photo Credits:
John T. Andrews
INSTAAR and Department of Geological Sciences, University of Colorado, Boulder.
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Last Modified: 12 October 2001

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