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meandering river that eventually cut a canyon as much as 2,000 feet deep. During the Ice Age, the canyon was filled to its rim with ice and at least one and perhaps more glaciers. They widened the canyon where weakened areas of rock existed and deepened the floor of Yosemite Valley, forming a U-shape. The last glacier filled Yosemite Valley to only about a third of its depth, leaving behind a glacial moraine (rock dam). Behind this moraine, the melting ice formed a lake. The lake slowly filled with sediment, creating the level floor which now supports meadows and forest. |
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Was there ever another half? Can you see the profile of an Ahwahnee Indian princess stained on the side of its face? |
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Yosemite National Park -- Geology the creation of Yosemite including a timeline |
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Yosemite Wonders brief descriptions of the |
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Yosemite - History an extensive history of Yosemite National Park |
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