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Geologic Unit: Chickwolnepy

Chickwolnepy intrusions [informal] (NH,ME)
Considered informal by the USGS. For informal usage, the rank or lithologic term should not be capitalized.

Ordovician, Middle
Whiterockian, late
Geologic Province:
New England province

Areal Extent:

Type Locality:
Not designated.

Unit Name History:
Named informally as Chickwolnepy complex (Moench and others, 1982).
Revised to Chickwolnepy intrusions; Age modified; Isotopic dating (Moench and others, 1995).
Assigned to Goldens Ranch Formation as basal member (Meibos, 1983).
NH State Geol. Map usage; 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