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1901. Geology of the Duluth metropolitan area, Bulletin 33, Plate 4

Maps University Of Minnesota Public content
1949. Schwartz, George M. (George Melvin), 1892-1980. Map of glacial (Quaternary age glacial and stream sediments) deposits of the Duluth Metropolitan Area, scale 1 inch = about 4 miles. Minnesota Geological Survey.

1902. Geology of the Duluth metropolitan area, Bulletin 33, Plate 5

Maps University Of Minnesota Public content
1949. Schwartz, George M. (George Melvin), 1892-1980. 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.

1903. Geology of the Duluth metropolitan area, Bulletin 33, Plate 6

Maps University Of Minnesota Public content
1949. Schwartz, George M. (George Melvin), 1892-1980. 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.

1904. Geology of the Duluth metropolitan area, Bulletin 33, Plate 7

Maps University Of Minnesota Public content
1949. Schwartz, George M. (George Melvin), 1892-1980. 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.

1905. Geology of the Duluth metropolitan area, Bulletin 33, Plate 8

Maps University Of Minnesota Public content
1949. Schwartz, George M. (George Melvin), 1892-1980. 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.

1906. Geology of the Duluth metropolitan area, Bulletin 33, Plate 9

Maps University Of Minnesota Public content
1949. Schwartz, George M. (George Melvin), 1892-1980. 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.