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Geologic Unit: Westboro

Westboro Formation (MA*)
Westboro Quartzite (MA*)

Proterozoic, Late*

Geologic Province:
New England province*

Areal Extent:

Type Locality:
Not designated. Named from town of Westboro, Worcester Co., eastern MA (Emerson and Perry, 1903).

Unit Name History:
Named Westboro quartzite (Emerson and Perry, 1903).
Revised (Emerson, 1917).
Age modified (LaForge, 1932).
Assigned to Blackstone series, Albion schist member assigned, contacts revised (Quinn and others, 1948).
Restricted from RI; Age modified (Nelson, 1974).
Revised to Westboro Formation (Bell and Alvord, 1976).
Age modified (Goldsmith, 1980).
Age modified; Isotopic dating (Olzewski, 1980).
Age modified (Goldsmith and others, 1982).
MA State Geol. Map usage (Zen and others, 1983).
Restricted (Bailey and others, 1989).
Revised; Overview (Goldsmith, 1991).

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