Grand Canyon; Colorado River; Exploring expeditions; Lava Falls; Prospect Canyon
Coconino County; Arizona
View of Grand Canyon from Lava Pinnacle, looking downstream, mouth of Prospect Canyon on left with small cinder cone on the point beyond. Lava Falls rapids just below mouth of Prospect Canyon. Figure on edge of right bank is probably Clem Powell. Credit: United States Department of the Interior Geological Survey, photo file No. PIO-H-148. Archives Neg. No. 57-PS-61.