Map showing configuration of the top of the Madison Group, Choteau 1-degree by 2-degree quadrangle, Montana [cartographic material] / by R.D. Feltis ; prepared by the U.S. Geological Survey in cooperation with Montana Bureau of Mines and Geology.
Relief shown by contours and spot heights. "Topographic contour interval 200 feet with supplementary contours at 100 foot intervals." "Base from U.S. Geological Survey 1954. Revised 1962." "Contours mapped during December 1982." "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 index map.
- Montana Bureau of Mines and Geology
- Held by
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