USGS Visual Identifier
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Geologic Unit: Chester

Chester Amphibolite (MA,VT)
Chester Amphibolite Member of Rowe Schist (MA*)
Chester Amphibolite Member of Pinney Hollow Formation (VT)


Geologic Province:
New England province*

Areal Extent:

Type Locality:
Chester, MA (Emerson, 1892, unpublished map).

Unit Name History:
Named (Emerson, 1892, unpublished map).
Overview (Emerson, 1898).
Revised to member of Pinney Hollow Formation in VT (Doll and others, 1961).
Rank reduced to member of Rowe Schist in MA; Restricted from VT; Age modified (Hatch and others, 1966).
Not used (Chidester and others, 1967).
MA State Geol. Map usage (Zen and others, 1983).

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