Train In TheGrand Canyon National Park Which Was One Of The First National Parks In The United States Editorial Photo

The canyon was created by the Colorado River over a period of 6 million years, but research released in 2008 suggests a 17 million year time span. The canyon is 277 miles 446 km long, ranges in width from 4 to 18 miles 6.4 to 29 km and attains a depth of more than a mile 1.6 km. Nearly 2 billion years of the Earth`s history have been exposed as the Colorado River and its tributaries cut their channels through layers of rock while the Colorado Plateau was uplifted