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Geologic Unit: French Pond

French Pond Granite of New Hampshire Plutonic Suite (NH*)
French Pond Granite (NH*)

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

Type Locality:
A circular stock 3 mi in diameter, 3 mi southeast of Woodsville. Named from French Pond, 4.5 mi southeast of Woodsville, Littleton and Moosilauke 15-min quadrangles, west-central NH (Billings, 1935).

Unit Name History:
[Please note: only the Billings (1955) 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 (Billings, 1935).
Revised; Age modified (Billings, 1955).
Age modified (Cady, 1969).
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