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| Grand Canyon National Park, Arizona © Doug Hickok All Rights Reserved A view across the Grand Canyon toward the North Rim illustrates the plateau's flatness, and the layers of stone which the Colorado River persistently cut through over time. |
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| Grand Canyon National Park, Arizona © Doug Hickok All Rights Reserved A view across the Grand Canyon toward the North Rim illustrates the plateau's flatness, and the layers of stone which the Colorado River persistently cut through over time. |