Marble Canon, one of the Gorges of the Colorado, here 1,200 feet deep. The steep cliff is grey limestone and the slope a brilliant red sandstone. Photographer: Wm. Bell Photographer's number: 29 Photographer's series: Expedition of 1872. :29

Courtesy of UC Berkeley, Bancroft Library

http://www.oac.cdlib.org/ark:/13030/tf929010s8/?order=1

Title:

Marble Canon, one of the Gorges of the Colorado, here 1,200 feet deep. The steep cliff is grey limestone and the slope a brilliant red sandstone. -- Photographer: Wm. Bell -- Photographer's number: 29 -- Photographer's series: Expedition of 1872.

Contributing Institution:

UC Berkeley, Bancroft Library