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Terms in this set (2)
Ancient sea, uplift reason its now thousands feet high. Colorado River may have been formed by an ancient lake that overflowed and over eons it carved the gorge that is now the GC.
Glacier formed. Muir and Whitney argued over how the valley was formed, Muir's theory won out. It is U shaped though because it was damned up at the bottom, formed a lake and formed a U shape rather than a typical V shape for a glacier formed valley/gorge
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