Geographical and Geological Survey of the Rocky Mountain Region (U.S.)Jenney, Walter P. (Walter Proctor), 1849-1921Mahlo, 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 centimetersJPEGUMN_ALMA:9952563360001701engDept. of the Interior, U.S.G. and G. Survey (Washington, D.C.)PublicMap of the Black Hills of Dakota : from explorations made in 1875MapsSouth DakotaWyoming1879University of Minnesota