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One of the best examples of formations caused by glaciers is the world
famous Yosemite National Park. It is located about three hundred miles
North of Los Angeles, and about one hundred and fifty miles East of Sacramento.
Geologists believe that the "U" shaped valley was created by the movement
of a glacier, hundreds of thousands of years ago. The more common, "V"
shaped valleys, on the other hand, are created by flowing streams.
Along with snow and ice, glaciers contain debris and rocks, some of which are very large. As the glacier moves through the valley, it scrapes against the walls. For this reason, the walls of Yosemite valley are very smooth. The steep vertical sides of Yosemite Valley create very beautiful waterfalls, some of which are the highest in the world
