1963. Austin, George S. and Sims, Paul K. Magnetic (interpretation of magnetic data collected from airborne or ground surveys, indicating the distribution and concentration of magnetic mine... Minnesota Geological Survey.
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1963. Austin, George S. and Sims, Paul K. Magnetic (interpretation of magnetic data collected from airborne or ground surveys, indicating the distribution and concentration of magnetic mine... Minnesota Geological Survey.
1910. Van Hise, Charles Richard, 1857-1918. Relief shown by contours. Contour interval 50 feet.; "Plate XVII"; Signed: A. Hoen & Company, Ltd., Baltimore.; Includes 2 geologic cross sections ... A. Hoen & Company Ltd (Baltimore, Md).
1744. Geologic map of Alabama
1926. Geological Survey of Alabama. Based on the geologic map of 1894 prepared by E.A. Smith ...; "Mapping of crystalline rocks revised by George I. Adams, paleozoic rocks by Charles ... (University], ).
1745. Geologic map of Alabama
1926. Geological Survey of Alabama. Based on the geologic map of 1894 prepared by E.A. Smith ...; "Mapping of crystalline rocks revised by George I. Adams, paleozoic rocks by Charles ... (University], ).
1993. Southwick, Dave L. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments), Archean rocks, bedrock outcrop (rock e... Minnesota Geological Survey.
1747. Geologic map of Colorado
1913. George, Russell D., 1866-. Printed on linen-faced paper. 92 x 126 centimeters Scale 1:500,000; 1 inch = approximately 8 miles General Map Collection. Colorado State Geological Survey (Boulder, Colorado).
1910. Geological Survey (U.S.). Relief shown by hachures.; Printed by A. Hoen & Co., Baltimore. 32 x 51 Centimeters Scale 1:62,500 General Map Collection. The Survey (Washington, D.C).
1966. Green, John C., 1932-, Phinney, William C., and Weiblen, Paul W. Map showing interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of the Gabbro Lake 15 minut... Minnesota Geological Survey.
1909. Allen, R. C. (Rolland Craten), 1881-1948. Relief shown by contours.; Geology by Geological Survey of Michigan. 70 x 44 centimeters Scale 1:45,000 General Map Collection. U.S. Geological Survey (Washington, D.C).