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USA | |
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| [var. Labradorite] Morrill (1958) Maine Mines & Minerals: Vol 1 - Western Maine.
Fisher, L.W. (1934) Graphite In Pegmatite. American Mineralogist, 19(4), 169-177. |
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| P. Cristofono collection 2021 |
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| King, Vandall T., Foord, Eugene E. (1994) Mineralogy of Maine Vol. 1 - Descriptive mineralogy. Maine Geological Survey. |
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| [var. Labradorite] Boudette, E., 1991, USGS Misc. Inv. Map I-2059 |
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| [var. Bytownite] King, Vandall T., Foord, Eugene E. (1994) Mineralogy of Maine Vol. 1 - Descriptive mineralogy. Maine Geological Survey. |
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| [var. Labradorite] Boudette, E., 1991, USGS Misc. Inv. Map I-2059 |
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| [var. Labradorite] King, Vandall T., Foord, Eugene E. (1994) Mineralogy of Maine Vol. 1 - Descriptive mineralogy. Maine Geological Survey. |
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| [var. Labradorite] Rainville, G. D. and Park, W. C. (1976) Nickeliferous Pyrrhotite Deposits, Knox County, Southeastern Maine in Lyons, P. C. and Brownlow, A. H. (editors) Studies in New England Geology, Memoir 146, Geological Society of America, p. 319-347. |
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| [var. Bytownite] W. B. Thompson, D. L. Joyner, R. G. Woodman, and V. T. King (2005) A Collector's Guide to Maine Mineral Localities. Maine Geological Survey Bulletin 41 |
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| [var. Labradorite] King, Vandall T., Foord, Eugene E. (1994) Mineralogy of Maine Vol. 1 - Descriptive mineralogy. Maine Geological Survey. |
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| Woodrow B. Thompson, Donald L. Joyner, Raymond G. Woodman, and V. T. King (1998) A Collector's Guide to Maine Mineral Localities, Bulletin 41, Third Edition, Maine Geological Suvery, pp. 106. |
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| Mason B., Jarosewich E. & Nelen J. A. (1979) The pyroxene-plagioclase achondrites. Smithson. Contrib. Earth Sci. 22: 27-45. |
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| [var. Labradorite] Hitchcock, Charles, 1861, Seventh Annual Report to the Board of Maine Agriculture. |
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| [var. Labradorite] King, Vandall T., Foord, Eugene E. (1994) Mineralogy of Maine Vol. 1 - Descriptive mineralogy. Maine Geological Survey. |
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| [var. Labradorite] Espenshade, G. H. and Boudette, E. L., 1964, Geology of the Greenville Quadrangle Maine, US Geological Survey Quadrangle Map GQ-350. Espenshade, G. H. and Boudette, E. L., 1967, Geology and Petrology of the Greenville Quadrangle, Piscataquis and Somerset Counties, Maine, US Geological Survey Bulletin 1241-F, p F1-F60. |
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| [var. Labradorite] Houston, Robert S., 1956, Genetic Study of Some Pyrrhotite Deposits of Maine and New Brunswick, Department of Development of Industry and Commerce, Augusta, Maine, pp. 117 + 6 plates. |
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| [var. Labradorite] Espenshade, G. H. and Boudette, E. L., 1964, Geology of the Greenville Quadrangle Maine, US Geological Survey Quadrangle Map GQ-350. Espenshade, G. H. and Boudette, E. L., 1967, Geology and Petrology of the Greenville Quadrangle, Piscataquis and Somerset Counties, Maine, US Geological Survey Bulletin 1241-F, p F1-F60. |
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| King, Vandall T., Foord, Eugene E. (1994) Mineralogy of Maine Vol. 1 - Descriptive mineralogy. Maine Geological Survey. |
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| King, Vandall T., Foord, Eugene E. (1994) Mineralogy of Maine Vol. 1 - Descriptive mineralogy. Maine Geological Survey. |
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| [var. Labradorite] McHone, J. Gregory and Trygstad, Joyce C. (1982) Mesozoic Mafic Dikes of Southern Maine, Maine Geology, Bulletin 2, Geological Society of Maine, p. 16-32. |
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| [var. Labradorite] McHone, J. Gregory and Trygstad, Joyce C. (1982) Mesozoic Mafic Dikes of Southern Maine, Maine Geology, Bulletin 2, Geological Society of Maine, p. 16-32. |
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| Webster, J. W., (1848). New locality of idocrase, anorthite, and molybdenite in Sanford, York Co., Maine, American Journal of Science, 2nd ser., v. 6, no. 18, p. 425. |
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| [var. Labradorite] Wandke, A., 1922, A Petrologic Study of the Cape Neddick Gabbro, A, J Sci fifth series 4:295-304 |
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| [var. Labradorite] Anderson, 1991. Maine Mineral Localities, 2nd ed. |
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| [var. Labradorite] Gilman, R., 1978, Bedrock Gepology of the Newfield 15' Quadrangle, Maine, ME Geol Surv OF-78-10. |
Heath Quarry, Casco, Cumberland County, Maine, USA