Skip to main content
U.S. flag

An official website of the United States government

Basalts of Warm River and Shotgun Valley, Idaho

Detailed Description

The Basalts of Warm River and Shotgun Valley, which erupted about 1.17 million years ago after the formation of Henrys Fork Caldera in southeast Idaho.  Photo by Brandi Lawler, University of Wyoming, August 8, 2018.

Sources/Usage

Public Domain.

Was this page helpful?