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Geography of Michigan / Michigan / Upper Peninsula of Michigan / United States / Douglass Houghton / Bela Hubbard / Houghton /  Michigan / Michigan Geological Survey / Houghton / Amos Eaton / Keweenaw Peninsula / Henry Schoolcraft


Part of the Geologic Map of the Middle and Western States published in Natural History of New York, Part IV, Geology by James Hall 1843, Albany New York. Hall stated, “Dr. Houghton, State Geologist of Michigan, has ob
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Document Date: 2012-01-10 02:00:00


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File Size: 1,29 MB

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