By: callanbentley
Image: USGS
License: Public Domain

Uploaded: 21 Apr 2020
Last Updated: 21 Apr 2020

125 megapixels
11,800 x 10,600 pixels
39.3 in X 35.3 in at 300dpi
0 pixels per inch

Mudge, M.R., 1972, Pre-Quaternary rocks in the Sun River Canyon area, northwestern Montana: U.S. Geological Survey, Professional Paper PP-663-A, scale 1:48,000