Long ago, the Grand ... by erosion. A trace of the mountains still exists in the Vishnu Basement Rocks, the base layer of rock that is located at the lowest part of the Grand Canyon today.
First, that the Grand Canyon ... layers in the canyon. MICHIO KAKU: Mm-hm. DR DAVE THAYER: And each one has a different thing to tell. MICHIO KAKU: Amazingly, long, long before the rock was ...
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