Map showing configuration of the top of the Madison Group, Shelby 1-degree by 2-degree quadrangle, Montana [cartographic material] / by R.D. Feltis ; prepared by the U.S. Geological Survey in cooperation with the Montana Bureau of Mines and Geology.
- Relief shown by contours and spot heights. "Topographic contour interval 200 feet. Supplementary contours at 100-foot intervals." "Base from U.S. Geological Survey 1957. Limited revision, 1967." "Contours mapped in March 1977." "This map is one of a series that shows the configuration of the top of the Madison Group of Mississippian age at a scale of 1:250,000. ... The maps are part of a preliminary study of the geohydrology of the Madison Group." Location map on envelope. Includes text and location map.
- Montana Bureau of Mines and Geology
- Held by
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