Yosemite Nature Notes - Episode 10 - Rock Fall

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Uploaded by on Jul 7, 2010

Since the glaciers retreated around fifteen thousand years ago, rock fall has been the major force of change in Yosemite Valley. Geologists work to understand this force of nature in order to protect the millions of visitors who come here each year.

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  • Magnificent reportage.

    

  • i never even saw a rock "fall" ??? I'm confused

  • I would imagine that the rock falls that occur on clear days would be caused by the heating and cooling of the cliff faces. Anything from the rocks themselves, or the moisture that has seeped through. The temperature causing expanding and contracting would cause them to become fragile. Being thousands of lbs of weight, eventually it would just crack and fall.

  • You can really get an idea of how tall the valley walls are by how slow the falling rocks are falling. Great footage!

  • No video but THIS is a rock fall.

    www3.sympatico.ca/goweezer/can­ada/frank.htm

    A large portion of an entire mountain (100 MILLION tons of limestone) in 100 seconds.

  • I love this series of videos.

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