Granite pegmatite, Grafton field. Located near the village of North Groton. (Has produced remarkable examples of
hydroxylherderite,
strengite,
phosphosiderite,
strunzite and other pegmatite phosphates.)
PLEASE TAKE NOTICE: Fletcher Mine Groton NH has been closed to the public for 20 years. Property is posted. Prosecution will result of trespassing. Adjoining property with mines is also privately owned. Please respect wishes of property owners concerned with your safety in mind.
Mineral List
45 entries listed. 39 valid minerals. 1 type locality (valid mineral). 4 erroneous literature entries.
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References
McNair, A. H.; Burnett, C. B.; Headley, J. B., Jr. (1943). Fletcher mica mine, Groton, New Hampshire (USGS Open-File Report 43-63).
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 868.
Moore and Ito (1978), Mineralogical Magazine: 42: 309-323.
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