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You searched for: geology Remove constraint geology Time Period 1900-1949 Remove constraint Time Period: 1900-1949

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11.

Geology of the Duluth metropolitan area, Bulletin 33, Plate 5 Maps maps university-of-minnesota

1949. Schwartz, George M. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of Township 48 North, Range 15 West, sc... Minnesota Geological Survey.

12.

Geology of the Duluth metropolitan area, Bulletin 33, Plate 6 Maps maps university-of-minnesota

1949. Schwartz, George M. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of Township 48 North, Range 16 West, sc... Minnesota Geological Survey.

13.

Geology of the Duluth metropolitan area, Bulletin 33, Plate 7 Maps maps university-of-minnesota

1949. Schwartz, George M. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of Township 48 North, Range 17 West, sc... Minnesota Geological Survey.

14.

Geology of the Duluth metropolitan area, Bulletin 33, Plate 8 Maps maps university-of-minnesota

1949. Schwartz, George M. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of Township 49 North, Range 15 West, sc... Minnesota Geological Survey.

15.

Geology of the Duluth metropolitan area, Bulletin 33, Plate 9 Maps maps university-of-minnesota

1949. Schwartz, George M. Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of Township 49 North, Range 16 West, sc... Minnesota Geological Survey.