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Geologic Unit: Spaulding

Spaulding Quartz Diorite of New Hampshire Plutonic Suite (NH*)

Devonian, Early*
Geologic Province:
New England province*
Areal Extent:

Type Locality:
Spaulding Hill in town of Dublin, Cheshire Co., southwestern NH (Fowler-Billings, 1949).

Unit Name History:
[Please note: only the Lyons and Livingston (1977) 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.]
Named as part of New Hampshire magma series (Fowler-Billings, 1949).
Assigned to New Hampshire plutonic series (Billings, 1955).
Age discussed (Lyons, 1964; Nielson and others, 1976).
Age modified; Isotopic dating (Lyons and others, 1977).
Age modified (Aleinikoff and others, 1979).
Age modified; Overview (Nielson, 1981).
NH State Geol. Map usage; Revised; Age modified (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