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You searched for: Collection Minnesota Geological Survey Remove constraint Collection: Minnesota Geological Survey Institution Minnesota Remove constraint Institution: Minnesota Year 1968 Remove constraint Year: 1968
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1. Geology and origin of iron ore deposits of the Zenith mine, Vermilion district, Minnesota, SP-2, Plate 1

1968. Machamer, J.F. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of 17th level of Zenith Mine, scale 1 i...

2. Geology and origin of iron ore deposits of the Zenith mine, Vermilion district, Minnesota, SP-2, Plate 2

1968. Machamer, J.F. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of 18th level of Zenith Mine, scale 1 i...

3. Geology and origin of iron ore deposits of the Zenith mine, Vermilion district, Minnesota, SP-2, Plate 3

1968. Machamer, J.F. Geology cross section diagrams of Zenith Mine, scale 1 inch = about 100 feet.

4. Preliminary geologic map of the Vermilion district and adjacent areas, northern Minnesota, M-5

1968. Sims, Paul K., Morey, G.B., Ojakangas, Richard W., and Griffin, W.L. Map showing interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) around the Vermilion area, ...

5. Simple Bouguer gravity map of Minnesota, Hibbing sheet, M-3

1968. Ikola, R.J. Bouguer gravity anomaly map (anomaly related to different densities of rocks in the upper crust, Bouguer anomaly is a corrected difference between ...