USGS Visual Identifier
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Geologic Unit: Brimfield

Usage:
Brimfield Group (CT*,MA*)
Brimfield Schist (CT*,MA*)
Brimfield Schist of Putnam Group (CT*)

Age:
Cambrian(?)*
Ordovician(?)*
Geologic Province:
New England province*

Areal Extent:
MA*
CT*

Type Locality:
Named from occurrence at Brimfield, Hampden Co., south-central MA (Emerson, 1898).

Subunits:
Bigelow Brook (CT*), Hamilton Reservoir (CT*,MA*), and Mount Pisgah (CT*,MA*) Formations of Brimfield Group; Daly Swamp Member of Brimfield Schist (CT*).

Unit Name History:
Named (Emerson, 1898; 1917).
Revised (Callaghan, 1931).
Areal limits (Hansen, 1956).
MA State Geol. Map usage (Zen and others, 1983).
Age modified (Pease, 1989).

Note: If you need more information, please contact Nancy Stamm (nstamm@usgs.gov).
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
URL http://ngmdb.usgs.gov/ngmdb/ngm_catalog.ora.html
Database project personnel
Last modified: 15-Jan-2013