Superseded by M-series maps M-181, M-182, and M-183.
Appendices to accompany mapping of the bedrock geology of Duluth area, St. Louis County, Minnesota, includes Plate 1 and Plate 2 at scale of 1:48,000. Scale 1:24,00; 1:100,000 maps included in appendices. Superseded by M-series maps M-181, M-182, and M-183.
Miller, James D., Jr.; Green, J.C.; Chandler, V.W..
Duluth mapping project.
Minnesota Geological Survey.
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