Obsidian Cliff lava flow, Yellowstone

(Credit: John Good, National Park Service. Public domain.)
Detailed Description
Photograph of Obsidian Cliff along Grand Loop Road between Norris and Mammoth Hot Springs. Photograph by John Good, U.S. National Park Service, 1965.
Details
Image Dimensions: 2100 x 1500
Date Taken:
Location Taken: US