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Map showing publication footprint
  • Usage in publication:
    • Hardwick gneiss
    • Hardwick gneissoid granite and granitite
    • Hardwick granite-gneiss
    • Hardwick granite*
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Granite
    • Gneiss
  • AAPG geologic province:
    • New England province
Publication:

Emerson, B.K., 1898, Geology of old Hampshire County, Massachusetts, comprising Franklin, Hampshire, and Hampden Counties: U.S. Geological Survey Monograph, 29, 790 p.


Summary:

Pg. 239-241, 317-318, pl. 34. Hardwick gneiss (p. 239-241); Hardwick gneissoid granite and granitite and Hardwick granite-gneiss (p. 317-318); Hardwick granite (on map, where it is described as dark thick-bedded biotite gneiss). (Hardwick granite adopted by the USGS.) Present in central Massachusetts and southwestern New Hampshire. Age is Late Carboniferous or post-Carboniferous. [See also Emerson, USGS Bull. 597, p. 238-239, 1917, where it is described, on map, as black biotite granite around Fitzwilliam granite, and is shown as extending northward into New Hampshire.]
Named from occurrence at and around Hardwick, Worcester Co., MA.

Source: US geologic names lexicon (USGS Bull. 896, p. 910).


Map showing publication footprint
  • Usage in publication:
    • Hardwick Tonalite*
  • Modifications:
    • Overview
  • AAPG geologic province:
    • New England province
Publication:

Zen, E-an (editor), Goldsmith, Richard (compiler), Ratcliffe, N.M. (compiler), Robinson, Peter (compiler), Stanley, R.S. (compiler), Hatch, N.L., Jr., Shride, A.F., Weed, E.G.A., and Wones, D.R., 1983, Bedrock geologic map of Massachusetts: U.S. Geological Survey [State Geologic Map], 3 sheets, scale 1:250,000


Summary:

Used as Hardwick Tonalite. Age is Early Devonian. Intrudes Lower Devonian Littleton Formation. [No explanation for change in rank term.]

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


Map showing publication footprint
  • Usage in publication:
    • Hardwick Tonalite*
  • Modifications:
    • Overview
  • 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:

Used as Hardwick Tonalite of New Hampshire Plutonic Suite on 1:500,000-scale derivative map showing plutons. Not separately mapped on 1:250,000-scale geologic map. Report also includes cross sections, correlation chart, and four 1:500,000-scale derivative maps.

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


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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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