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Map showing publication footprint
  • Usage in publication:
    • Highlandcroft granodiorite
  • Modifications:
    • Named
  • Dominant lithology:
    • Granodiorite
  • AAPG geologic province:
    • New England province
Publication:

Billings, M.P., 1935, Geology of the Littleton and Moosilauke quadrangles, New Hampshire: New Hampshire State Planning and Development Commission, 51 p.


Summary:

Named for a large estate called Highlandcroft on St. Johnsbury Rd, 1.5 mi west-northwest of Littleton, NH. Estate is located on largest body of the rock. Consists of chiefly greenish-gray granodiorite. Applied to the granodiorite and associated intrusives that are younger than Albee, Ammonoosuc, and Partridge formations and are older than Clough, Fitch, and Littleton formations. [Highlandcroft granodiorite is part of the Highlandcroft magma series.]

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


Map showing publication footprint
  • Usage in publication:
    • Highlandcroft granodiorite
  • Modifications:
    • Mapped
  • AAPG geologic province:
    • New England province
Publication:

Billings, M.P., 1937, Regional metamorphism of the Littleton-Moosilauke area, New Hampshire: Geological Society of America Bulletin, v. 48, no. 4, p. 463-566, (incl. geologic maps, scale 1:62,500)


Summary:

Pl. 1. Highlandcroft granodiorite of Highland Croft magma series. Map bracket shows Highlandcroft granodiorite above Partridge formation and below Clough conglomerate. Age is Late Ordovician(?).

Source: US geologic names lexicon (USGS Bull. 1200, p. 1759).


Map showing publication footprint
  • Usage in publication:
    • Highlandcroft Granodiorite*
  • Modifications:
    • Geochronologic dating
    • Age modified
  • AAPG geologic province:
    • New England province
Publication:

Lyons, J.B., Aleinikoff, J.N., and Zartman, R.E., 1986, Uranium-thorium-lead age of the Highlandcroft Plutonic Suite, northern New England: American Journal of Science, v. 286, no. 6, p. 489-509.


Summary:

U-Th-Pb dating yields age of 450+/-Ma. [Using the 1983 DNAG time scale, the rock is Late Ordovician.]

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


Map showing publication footprint
  • Usage in publication:
    • Highlandcroft Granodiorite
  • Modifications:
    • Not used
  • AAPG geologic province:
    • New England province
Publication:

Moench, R.H., and Pankiwskyj, K.A., 1988, Geologic map of western interior Maine: U.S. Geological Survey Miscellaneous Investigations Series Map, I-1692, 1 sheet, 21 p., scale 1:250,000


Summary:

Highlandcroft Plutonic Suite not formally subdivided, so the name Highlandcroft Granodiorite is not used.

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


Map showing publication footprint
  • Usage in publication:
    • Highlandcroft Granodiorite
  • Modifications:
    • Not used
  • AAPG geologic province:
    • New England province
Publication:

Moench, R.H., Boone, G.M., Bothner, W.A., Boudette, E.L., Hatch, N.L., Jr., Hussey, A.M., II, Marvinney, R.G., and Aleinikoff, J.N., 1995, Geologic map of the Sherbrooke-Lewiston area, Maine, New Hampshire, and Vermont, United States, and Quebec, Canada: U.S. Geological Survey Miscellaneous Investigations Series Map, I-1898-D, 2 sheets, 56 p., scale 1:250,000, Prepared in cooperation with Maine and New Hampshire geol. surveys


Summary:

Only Highlandcroft Plutonic Suite is used. Descriptive petrologic names are given to its subdivisions.

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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