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Start Over Author Powell, John Wesley, 1834-1902 Collection p16022coll230 Bounding Box -40.000931 39.999015 -39.999064 40.000987

1. Geological map of the Black Hills of Dakota

Maps University Of Minnesota Public content
1879. Geographical and Geological Survey of the Rocky Mountain Region (U.S.), Newton, Henry, 1845-1877, and Powell, John Wesley, 1834-1902. 1 in. = 4 miles. (W 104°45ʹ--W 102°15ʹ/N 44°45ʹ--N 43°30ʹ). Relief shown by contours, hachures and spot heights. "Field work 1875. Publication ... U.S. Geological Survey (Washington, D.C).