Yosemite Valley, California During Retreat of the Glaciers

Steven Dutch, Natural and Applied Sciences, University of Wisconsin - Green Bay
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As the ice retreated up Yosemite Valley, a lake formed between the glacier and its end moraine. San and silt were deposited on the lake bottom to a depth of a couple of hundred feet, giving the valley a square bottom instead of the rounded U shape typical of most glacial valleys.

Present Scene

Possible Coloring

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Created 25 November 2005, Last Update 25 May 2011

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