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Geological map of Hennepin County, Minn Maps maps university-of-minnesota

1876. Winchell, Newton Horace, 1839-1914. Cartographic Details: Scale not given. Photocopy. "1876." Dimensions: 58 x 49 centimeters.


Geologic Map of Pigeon Point, Minnesota Maps maps university-of-minnesota

1910. Bayley, William Shirley, 1861-1943, A. Hoen & Co., and U.S. Lake Survey. Cartographic Details: Scale 1:22500. "By W.S. Bayley, 1890." Relief shown by contours. Includes 2 cross section insets and legend of rock types. "M... U.S. Geological Survey (Washington, D.C.), 1910.


Preliminary geological map of the iron bearing rocks of the northeastern part of Minnesota Maps maps university-of-minnesota

1887. Winchell, Newton Horace, 1839-1914, Winchell, Alexander, 1824-1891, and Geological and Natural History Survey of Minnesota. Cartographic Details: Scale approximately 1:330,000 (W 92°1'--W 89°30'/N 48°14'--N 47°3'). Relief shown by hachures. Cover title: Winchell's Geolog... Geological and Natural History Survey of Minnesota.