Hikers on Mount Everts.

Detailed Description
On Mt. Everts, shallow-sea sedimentary rocks from the Cretaceous period are the overlain by the Huckleberry Ridge Tuff volcanic deposit from the first caldera-forming eruption of the Yellowstone hotspot 2.1 million years ago. NPS photo by Jacob W. Frank, June 11, 2017 (https://www.flickr.com/photos/yellowstonenps/35704359296/).
Sources/Usage
Public Domain.