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RE: Adsactly Education - Colorado River
The estimated age of the Earth is 4.6 - 4.7 billion years. Anyone who's ever taken a geology class can tell you that. The Colorado River was consolidated to it's present course over 2 million years ago. Which is fairly recent in geologic time, when you consider that the oldest rocks exposed at the bottom of the Grand Canyon are 2 billion years old.
Yep, very accurate comment. The rocks in the bottom of the Canyon are among the oldest on earth.