This paper provides an account of a series of beds embraced within the Laramie and covering the greater part of the state of Montana east of the Rocky mountains.

Letter from J.L. Truscott, Dealer in General Merchandise Glasgow, Montana stating that he had received a letter from Pless stating that he will be down the 1st and they should wait.

Map shows counties, Native American reservations, military posts, railroads, cities, towns, and notable physical features. Relief shown by hachures. Scale [ca. 1:3,900,000].

From introduction: The Three Forks sheet of Montana includes the area lying between the parallels of 450 and 460, and extending from longitude 111 to 1120. The three forks of the Missouri river unite in the north central portion of this area about 5 miles south of the northern line of the map.

From outline: The present paper gives a detailed account of the glaciation of the Snowy mountains and of the upper valleys of the Yellowstone, whose deposits show an unusual phase of alpine glaciation. The evidence thus far gathered shows that a large body of ice, originating in the ice sheets of the Yellowstone National Park, pushed northward, filling the upper valleys of the Yellowstone and extending down that stream 36 miles north of the park boundary.