New edition of Flagstaff geologist’s book shows evolving theories on Grand …

Published on September 28, 2012 by

A new theory of the forming of the Grand Canyon

When I first visited the Grand Canyon years ago, I was told about how the Colorado River formed the canyon over thousands of years. Now there is a theory that another river was also involved. Geologist Wayne Ranney talks about the new theory in his book "Carving Grand Canyon."

New edition of Flagstaff geologist's book shows evolving theories on Grand ...

"There to help make sense of it all is Flagstaff geologist Wayne Ranney, whose 2005 "Carving Grand Canyon" set out to share with the general public all of the evidence, theories and mystery surrounding the geologic ideas of how the canyon may have ..."

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