USGS Visual Identifier
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Geologic Unit: New Hampshire

New Hampshire Plutonic Suite (NH*,ME*,MA*)
/New Hampshire plutonic series [informal] (ME,NH,VT)
["New Hampshire plutonic series" considered informal. The practice of employing "Series" for lithostratigraphic or lithodemic nomenclature is now regarded as improper. Term "Series" is applied formally only to chronostratigraphic units (ACSN, 1961, 1970; NACSN, 1983).]


Geologic Province:
New England province*

Areal Extent:

Type Locality:
Type area: Littleton and Moosilauke quadrangles, Grafton Co., northwestern NH (Billings, 1935, written commun.; see US geologic names lexicon, USGS Bull. 896).

Concord, Bickford Granites. Kinsman, Bethlehem Granodiorites. Coys Hill Granite. Winnipesaukee, Spaulding Quartz Diorites. Many others.

Unit Name History:
[Please note: only the Billings (1956), Lyons and Livingston (1977), Hatch (1979), Boudette (1980), Thompson (1990), Moench and others (1995), and Lyons and others (1997) references include synopses here. The remaining references, plus many others not listed here, 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.]
First used (Billings, 1934).
Named (Billings and Williams, 1935).
Revised (Billings, 1935).
Overview (Billings, 1956).
Age modified (Cady, 1969).
Age modified; Isotopic dating (Lyons and Livingston, 1977).
Revised (Hatch, 1979).
Not used (Boudette, 1980).
Areal limits; Age modified; Isotopic dating (Thompson, 1990).
Components revised; Age modified; Isotopic dating (Moench and others, 1995).
NH State Geol. Map usage, components revised; 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