"Granite" quarries, opened in 1824 for the construction of the armory at Springfield, Massachusetts. Biotite-quartz monzonite gneiss with pegmatite bands up to three inches thick.
Mineral List
19 entries listed. 11 valid minerals.
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References
Dale, T. N. (1910). Supplementary Notes on the Commercial Granites of New England (in
Contributions to Economic Geology, USGS Bulletin 470).
Emerson, B. K. (1895): A Mineralogical Lexicon of Franklin, Hampshire, and Hampden Counties, Massachusetts (USGS Bulletin 126).
Emerson, B.K. (1917) Geology of Massachusetts and Rhode Island (USGS Bulletin 597), p. 258.
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