determining the age of the sierra nevada range

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dof

9th July 2006 - 05:48 AM

http://www.physorg.com/news71418588.html

The article did not discuss why a mid 1800s "water canon" (obviously not the high pressure systems used today) could "cut away half a mountain in a few minutes" I would allow for some exaggeration) but 40+ million years didn"t erode any of this clay. The height was virtually unchanged for 40 million years. The same scientist claim that the granite of the Rocky Mountains has sustained significant erosion since their creation.

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