USGS Visual Identifier
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Geologic Unit: Massabesic

Massabesic Gneiss Complex (NH*,MA*) Massabesic Gneiss (NH)

Proterozoic, Late*
Geologic Province:
New England province*

Areal Extent:

Type Locality:
Exposures around Lake Massabesic, Manchester quadrangle, Hillsboro, southeastern NH (Sriramadas, 1966).

Unit Name History:
[Please note: only the Goldsmith and others (1982), Zen and others (1983), and Lyons and others (1997) references include synopses here. The remaining references have yet to be added from the GNC index card files. Until then, feel free to contact us if you would like complete bibliographic citations.]
Named Massabesic Gneiss of New Hampshire Magma series (Sriramadas, 1966).
Revised to part of New Hampshire Plutonic series; Age modified (Greene, 1970).
Age discussed (Aleinikoff and others, 1979).
Revised to Massabesic Gneiss Complex; Age modified; Isotopic dating; Extended into MA (Goldsmith and others, 1982).
MA State Geol. Map usage (Zen and others, 1983).
Age modified (Eusden and others, 1987).
NH State Geol. Map usage; Age modified; Isotopic dating (Lyons and others, 1997).

Note: If you need more information, please contact Nancy Stamm (
Asterisks (*) indicate usage by the U.S. Geological Survey. Other usages by state geological surveys.

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

Slashes (/) indicate unit name usage violates the 1983 North American Stratigraphic Code. This violation may be explained within brackets ([ ]).

U.S. Department of the Interior, U.S. Geological Survey, Reston, VA, USA
Database project personnel
Last modified: 15-Jan-2013