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USA | |
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| Wall, Eby, and Winter, 2004. |
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| Sears, JH, 1905, Geology of Essex County, Mass. |
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| Sears, JH, 1905, Geology of Essex County, Mass. |
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| Gleba, Peter P. (2008) Massachusetts Mineral and Fossil Localities. Kreueger Enterprises, Inc. |
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| Dale, Thomas Nelson (1908): The Chief Commercial Granites of MA, NH, and RI (USGS Bulletin 354). |
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| P Cristofono collection , 2009 |
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| Dale, Thomas Nelson (1908): The Chief Commercial Granites of MA, NH, and RI (USGS Bulletin 354). |
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| Dale, Thomas Nelson (1908): The Chief Commercial Granites of MA, NH, and RI (USGS Bulletin 354). |
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| Dale, Thomas Nelson (1908): The Chief Commercial Granites of MA, NH, and RI (USGS Bulletin 354). |
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| Dale, T. N. (1910). Supplementary Notes on the Commercial Granites of New England (in Contributions to Economic Geology, USGS Bulletin 470). |
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| Bulletin of the Essex Institute, VOLUME XVI 1884 |
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| Dale, T. N. (1910). Supplementary Notes on the Commercial Granites of New England (in Contributions to Economic Geology, USGS Bulletin 470). |
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| Castle, R.O., Hepburn, J.C., Kopera, J.P. (2005). Bedrock Geologic Map of the Reading Quadrangle, Massachusetts |
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| Gleba, Peter P. (2008) Massachusetts Mineral and Fossil Localities. Kreueger Enterprises, Inc. |
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| Gleba, Peter P. (2008) Massachusetts Mineral and Fossil Localities. Kreueger Enterprises, Inc. |
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| [var. Titanium-bearing Magnetite] Emerson, 1917. Geology of Mass. & RI, p. 182. |
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| Sears, John Henry (1905): The Physical Geography, Geology, Mineralogy and Paleontology of Essex County |
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| Dale, T. N. (1910). Supplementary Notes on the Commercial Granites of New England (in Contributions to Economic Geology, USGS Bulletin 470). |
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| McKinstry, H. E. (1921) The minerals of Rockport, Massachusetts. American Mineralogist, 6 (3) 56-60 |
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| Dale, Thomas Nelson (1908): The Chief Commercial Granites of MA, NH, and RI (USGS Bulletin 354). |
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| Palache, Charles (1950) Fayalite at Rockport, Massachusetts. American Mineralogist, 35 (9-10) 877-881 |
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| Dale, Thomas Nelson (1908): The Chief Commercial Granites of MA, NH, and RI (USGS Bulletin 354). |
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| Dale, T.N. (1908) The Chief Commercial Granites of Massachusetts, New Hampshire and Rhode Island. United States Geological Survey, Bulletin 354, 228 pages. |
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| (1917) Geology of Massachusetts and Rhode Island. Bulletin Vol. 597. US Geological Survey doi:10.3133/b597 |
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| Gleba, Peter P. (2008) Massachusetts Mineral and Fossil Localities. Kreueger Enterprises, Inc. |
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| P. Cristofono collection, 2013 |
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| Towne, Warren G. Mrs. (1896): The Topsfield Copper Mines (The Historical Collections of the Topsfield Historical Society, Volume 2), pp. 73-81.
Towne, Warren G. Mrs. (1896): The Topsfield Copper Mines (The Historical Collections of the Topsfield Historical Society, Volume 2), pp. 73-81. |
Salem, Essex County, Massachusetts, USA