And the Colorado wasn't alone in the effort. Its many ancient tributaries of all sizes each did their bit, the many catastrophic floods bound to occur over millions of years carrying way massive amounts of material in a series of powerful debris flows. No sooner (in geologic time) would a tectonic uplift occur than its edges and crevices would be gnawed away by these forces, producing the amazing canyon network that we call the Grand Canyon.<quoted text>
No, you mental midget, it just means that the Colorado River has been carving the Grand Canyon for millions of years so that even the high end of the river managed to carve over 4000 feet of rock. What's worse than you being stupid is that you back up your idiotic assertion with even more stupid crap from a Cretinist website.