Grand Canyon much younger than previously thought

Posted by Southern Man on Jul 22, 2002 at 08:03

Growing numbers of geologists now believe that Marble Canyon and the Inner Gorge may be no more than 700,000 years old -- veritable infants on the geologic time scale, and much younger than the earlier 3-million- to 5-million-year-old estimates. Some scientists now believe that a third of the canyon's depth may have been cut in the blink of a geologic eye -- perhaps during the past 600,000 to 700,000 years.

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