USGS Visual Identifier
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Geologic Unit: Winnipesaukee

Winnipesaukee Quartz Diorite (NH*)

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

Type Locality:
Lake Winnipesaukee, Belknap and Carroll Cos., east-central NH (Hitchcock, 1874).

Unit Name History:
Named Lake Winnepesiogee gneiss (Hitchcock, 1874).
Abandoned (Billings, written commun., 1935).
Reinstated as Winnipesaukee quartz diorite of New Hampshire magma series; Age modified (Quinn, 1937).
NH State Geol. Map usage (Billings, 1955).
NH State Geol. Map usage; 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