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National Geologic Map Database
Map showing publication footprint
  • Usage in publication:
    • Fitzwilliam granite*
  • Modifications:
    • [Principal reference]
  • Dominant lithology:
    • Granite
  • AAPG geologic province:
    • New England province
Publication:

Emerson, B.K., 1917, Geology of Massachusetts and Rhode Island: U.S. Geological Survey Bulletin, 597, 289 p.


Summary:

Pg. 238 and map. Fitzwilliam granite. Light-gray muscovite-biotite granite, of even, fine grain. Recognized in southwestern New Hampshire and extreme central northern Massachusetts; it just enters Massachusetts from Fitzwilliam, New Hampshire. Assigned to late Carboniferous or post-Carboniferous.
Named for town of town of Fitzwilliam, Cheshire Co., southwestern NH.

Source: US geologic names lexicons (USGS Bull. 896, p. 736; USGS Bull. 1200 p. 1359); supplemental information from GNU records (USGS DDS-6; Reston GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Fitzwilliam Granite*
  • Modifications:
    • Overview
    • Geochronologic dating
  • AAPG geologic province:
    • New England province
Publication:

Lyons, J.B., Bothner, W.A., Moench, R.H., and Thompson, J.B., Jr., 1997, Bedrock geologic map of New Hampshire: U.S. Geological Survey [State Geologic Map], 2 sheets, scale 1:250,000 and 1:500,000, Prepared in cooperation with DOE and State of New Hampshire


Summary:

Assigned as Fitzwilliam Granite of New Hampshire Plutonic Suite on 1:500,000-scale derivative map showing plutons and sample localities for isotopic dating. Not separately mapped on 1:250,000-scale geologic map. Isotope age of 383 +/-? Ma [Middle Devonian per time scale of Palmer (1983)] was reported by Hayward (1983, 1987). Report includes geologic map, cross sections, correlation chart, and four 1:500,000-scale derivative maps.

Source: GNU records (USGS DDS-6; Reston GNULEX).


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates published by U.S. Geological Survey authors.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).

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