Granite pegmatite. Metamorphic country rocks (including Conway Schist) contain: actinolite, almandine, biotite, calcite, diopside, dravite, ilmenite, kyanite, muscovite, quartz, rutile, siderite-ankerite, staurolite, and zoisite (Shaub, 1954 and V. King notes). Shaub also listed "aragonite" and other species, but the report is certainly in error. This historic site was noted for terminated spodumene crystals, collected in the mid- to late-1800s and now found in museums around the world, although it was not the only historical locality for terminated spodumene crystals in the town.
Note: The town of Huntington was called Norwich until 1855.
Mineral List
35 entries listed. 26 valid minerals. 2 erroneous literature entries.
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References
Hartwell, C. and Hitchcock, E. (1850): On a new Spodumene locality at Norwich, Mass., American Journal of Science, second series, 10:119-120).
Holland, Gilbert H. (1855): History of Western Massachusetts, Vol. 1.
Emerson, B. K. (1917): Geology of Massachusetts and Rhode Island, USGS Bulletin 597, p.257.
Shaub, B. M. (1954): Walnut Hill Spodumene Ledge Near South Worthington, Massachusetts, Rocks & Minerals, 29: 339-343.
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