USGS Visual Identifier
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Geologic Unit: Bigelow Brook

Bigelow Brook Formation of Brimfield Group (CT*)
Bigelow Brook Member of Paxton Formation (MA*)


Geologic Province:
New England province*

Areal Extent:

Type Locality:
Type section (composite): lower and middle members in lower section northeast of Black Pond fault, along line from point on Crystal Brook Pond trending N. 29 deg. W. to where unpaved road crosses quadrangle border in Eastford quadrangle, Windham Co., CT. Middle and upper members in upper section, along line from intersection of North Ashford Road and unnamed road trending N. 54 deg. W. to point northwest of Lead Mine Brook and south of Susstek Road in Westford quadrangle, Windham Co., CT (Pease, 1972).

Unit Name History:
Named (Pease, 1972).
Revised (Peper and others, 1975).
Revised to member of Paxton Formation; Age modified (Goldsmith, 1982).
MA State Geol. Map usage (Zen and others, 1983).
Age modified (Pease, 1989).

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