Skip to main content
U.S. flag

An official website of the United States government

Structural map of the onset of the Yellowstone-Snake River Plain hotspot track

Detailed Description

Beginning of Yellowstone-Snake River Plain hotspot track and resulting northeasterly path of the ancestral Missouri River starting about 16.5 million years ago.  Modified from Hyndman D.W., and Thomas, R.C., 2020, Roadside Geology of Montana, Mountain Press Publishing, 464 p.

Sources/Usage

Public Domain.

Was this page helpful?