Slides showing a preliminary geologic map of the Dillon 1 degree by 2 degrees Quadrangle, Montana and Idaho
This open-file report consists of two colored 35-mm photographic slides. Slide 1 is a photograph of a hand-colored copy of the geologic map of the Dillon 1' x 2' quadrangle. Scale of original 1:250,00. Slide 2 is a brief explanation of the map units shown on slide 1.
Idaho;Montana↗