Tell Me How Forums : Science
CanyonBy: Bhenry3 [4-June-09 12:23AM]2 posts | 
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The Grand Canyon was formed by the Colorado river over millions of years. I have always wondered where the Mississippi river canyon is. Or the Amazon river canyon. Have these rivers not been flowing for millions of years? This has always puzzeled me. Why only the Grand Canyon formed by the Colorado river?
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