If evolutionists believe that the Grand Canyon was formed by the Colorado River, why don’t rivers like the Mississippi, Missouri or the Ohio also have some form of canyon?
Andrew Snelling is a PhD geologist with industry experience, and one of the best proponents of the YEC position, in my opinion, although I am not personally convinced about his and others’ theories of runaway subduction of continental plates. This article gives a good answer to the question of geomorphic differences between different watersheds.
Image credit: http://photos.tetto.org/3684/
See on www.answersingenesis.org