This is an original 1922 geological map on a type of vellum with two vertical folds. Unique to this map is that it has a chart of the Geology with matching letters on the map image.
This product would be a great fit for history enthusiasts interested in railroads and the Colorado Rockies, seeking to explore and learn from an authentic antique map of the Denver Rio Grande Railroad, featuring Montrose, Delta, and Gunnison.
