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6. Geologic Map of Pigeon Point, Minnesota Image University of Minnesota Public content

1910. Bayley, William Shirley, A. Hoen & Co., and U.S. Lake Survey. Scale 1:22500. "By W.S. Bayley, 1890." Relief shown by contours. Includes 2 cross section insets and legend of rock types. "Monograph LII Plate XII...

9. Preliminary sketch of the geology of India Image University of Minnesota Public content

1877.  Geological Survey of India. Scale 1:4055040. 1 in. to 64 miles. To accompany: A manual of the geology of India. Pt. 1-2. Calcutta: Geological Survey Office, 1879-87. 106 x 110 cm.