Grand Canyon could be much older than thought [Archive]

View Full Version : Grand Canyon could be much older than thought

Bok

11-29-2012, 04:38 PM

Dating of rock erosion pegs the ancient chasm as 70 million years old

More... (http://www.sciencenews.org/view/generic/id/346741/title/Grand_Canyon_could_be_much_older_than_thought__)