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Geologic Unit: Southbridge

Southbridge Formation of the Paxton Group (MA*,CT*)

Proterozoic, Late*
Geologic Province:
New England province*

Areal Extent:

Type Locality:
Type section: line extending N. 40 deg. W. from point where Dudley Hill Road leaves Southbridge quadrangle, [UTM] 388,700 ft N; 464,225 ft E, to Cady Brook northwest of Carlton Street School. Named from town of Southbridge, Worcester Co., MA (Pease, 1972).
Extended along Quinebaug River in Webster quadrangle to 1 km southeast.

Unit Name History:
Named (Pease, 1972).
Rank reduced (Goldsmith and others, 1982).
MA State Geol. Map usage (Zen and others, 1983).
Rank reduced (Barosh and Moore, 1988).
Revised (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