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Start Over Author Geographical and Geological Survey of the Rocky Mountain Region (U.S.) Year 1879 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).

2. Map of the Black Hills of Dakota : from explorations made in 1875

Maps University Of Minnesota Public content
1879. Geographical and Geological Survey of the Rocky Mountain Region (U.S.), Jenney, Walter P. (Walter Proctor), 1849-1921, and Mahlo, Emil, 1851-1904. 1 in. = 4 miles. Relief shown by hachures and spot heights. "Geology of the Black Hills by Henry Newton E.M."--Upper right. 74 x 89 centimeters... Dept. of the Interior, U.S.G. and G. Survey (Washington, D.C.).