Oak Hill Quarry, Oak Hill, Westford, Middlesex Co., Massachusetts, USAGranite quarry near the north end of Oak Hill, opened ca. 1830. There are dikes of pegmatite and aplite.
ReferencesDale, T. N. (1910). Supplementary Notes on the Commercial Granites of New England (in Contributions to Economic Geology, USGS Bulletin 470).
9 entries listed. 5 valid minerals.
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New Locality Added: Sheppard occurrence, Barrie Township, Frontenac Co., Ontario, CanadaFrom Reiner Mielke, 23rd Oct 2014 00:47:15