The extensive formations, canyons and erosion of the Colorado Plateau region are described and illustrated. Succession of these sedimentary rocks and their lithology is presented with notation of their great 200,000 square mile expanse. The relative lack of erosion at the various horizons in comparison with the amount that has occured on the present surface of the plateau is used to argue for a relatively short period of time for their formation. A general lack of sources for these vast deposits of sandstone, shale and conglomerate is shown as being critical to a satisfactory explanation of them from the viewpoint of uniformitarianism. Conclusions are (1) sediments were brought in from great distances (2) great sweeps of water instead of local river or flood action were necessary to spread out these sediments over this vast area, and (3) the various formations were laid down one after the other in rapid succession.