Yet, it is the canyon’s rock walls that allow people to develop their greatest perspective on geologic time, because of these rocks’ immense age, their fossil record, and because these rocks formed in environments far different than those found in northern Arizona today.
With a rock record that spans more than 1500 m.y., Grand Canyon is truly a panoramic view into the geologic past.
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The Grand Canyon landscape is geologically young, being carved within just the last 6 m.y.