Outcrop map of southern part of Duluth Complex and associated Keeweenawan rocks, St. Louis and Lake Counties, Minnesota [cartographic material] / by Bill Bonnichsen.
"Base modified and compiled from General Highway Maps, Lake County, sheets 1 and 2 of 3, 1971, and St. Louis County, sheets 2 and 4 of 7, 1971, Minnesota Department of Highways." "Compiled September, 1971." Includes location map.
- Minnesota Geological Survey, University of Minnesota
- Held by
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