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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.


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.


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.