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USA | |
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| Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp. |
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| Demark, R. S. (2000) "Mines and Minerals of Michigan's Iron Country", Rocks & Minerals. |
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| www.deq.state.mi.us/documents/deq-glm-rcim-geology-Minerals_Found_In_Michigan.Pdf. |
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| Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 111. & 61:328. |
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| Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp. |
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| Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 112. |
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| Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp. |
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| Dana 6: 1086. |
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| Journal of Paleolimnology 24: 199β211, 2000. |
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| USGS Prof Paper 407 |
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| Allen Lundgren collection |
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| McSwiggen, P. L., Morey, G. B., & Cleland, J. M. (1994). Occurrence and genetic implications of hyalophane in manganese-rich iron-formation, Cuyuna Iron Range, Minnesota, USA. Mineralogical Magazine, 58(392), 387-400.
Grout, F.F. (1946): Acmite occurences on the Cuyuna Range, Minnesota. American Mineralogist. 31: 125-130 |
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| Mineral samples purchased by Allen Lundgren from Minnesota mineral dealer |
Mangan No. 1 mine, Cuyuna North Range, Crow Wing County, Minnesota, USA