Geographical and Geological Survey of the Rocky Mountain Region (U.S.)Newton, Henry, 1845-1877Powell, John Wesley, 1834-19021 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 1879." "Geology of the Black Hills by Henry Newton, E.M."--Upper right margin.75 x 89 centimetersJPEGUMN_ALMA:9952567940001701engU.S. Geological Survey (Washington, D.C)PublicGeological map of the Black Hills of DakotaMapsSouth DakotaWyoming1879University of Minnesota