The romance of the Colorado River : the story of its discovery in 1540, with an account of the later explorations, and with special reference to the voyages of Powell through the line of the great canyons (1903)
Dellenbaugh, Frederick Samuel, 1853-1935 · New York ; London : G.P. Putnam's Sons · leaf 101
Effect of More Rain 45 erosive forces of desert lands. The main stream-courses are thus in the lower arid regions and in sedimentary formations, while their water-supply comes from far away. The deepest gorges, therefore, will be found where the rainfall is least, un¬ less diminishing altitude… … Pinnacle in the Canyon de Chelly. About 1500 feet high. It is much wider from the side. Photograph by Ben Wittick. the sources of supply, and in the driest area, but one, of the whole drainage system. It ends abruptly with the termination of the high arid plateau which made it possible, but had…
Colorado River (Colo.-Mexico) · Grand Canyon
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
