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1971
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2. Outcrop map of southern part of Duluth Complex and associated Keweenawan rocks, St Louis and Lake Counties, Minnesota, M-11 Outcrop map of southern part of Duluth Complex and associated Keweenawan rocks, St Louis and Lake Counties, Minnesota, M-11 Outcrop map of southern part of Duluth Complex and associated Keweenawan rocks, St Louis and Lake Counties, Minnesota, M-11
1971. Bonnichsen, Bill. Map showing locations of bedrock outcrops (rock exposed at the land surface), scale 1:125,000.