Carving Grand Canyon: New Theories About An Old Canyon By Gillian Ferris • Nov 15, 2012 TweetShareGoogle+Email Flagstaff geologist Wayne Ranney discusses some new theories of how - and when - the Grand Canyon formed. The second edition of Ranney's book, Carving Grand Canyon, was recently released. Wayne Ranney Tags: Grand CanyongeologyScience and TechnologyTweetShareGoogle+Email Related Content Composing with the Canyon 4 years ago Land Lines: Toroweap 4 years ago To Carry It Out or Leave it. That's the Stinky Question Facing the Grand Canyon Managers. 4 years ago McCain Wins Concession on Flights Over Grand Canyon. 4 years ago Commentator Scott Thybony Shares Some Rules Of The Grand Canyon 4 years ago View the discussion thread.