U.S. Geological Survey Photographic Library

ID. Wheeler, 81

Light and shadow in the Black Canyon of the Colorado river in Nevada, viewed from Mirror Bar. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1871 Expedition).

Light and shadow in the Black Canyon of the Colorado river in Nevada, viewed from Mirror Bar. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1871 Expedition).

Image file: /htmlorg/lpb128/land/wg000081.jpg