USGS Visual Identifier
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Geologic Unit: Brighton

Brighton Melaphyre of Boston Bay Group (MA*)
Brighton Volcanics of Boston Bay Group (MA)

Proterozoic, Late*
Cambrian, Early(?)*
Geologic Province:
New England province*

Areal Extent:

Type Locality:
Brighton, eastern MA (Dodge, 1891).

Unit Name History:
First used (Dodge, 1881).
Named (LaForge, 1932).
Overview (Nelson, 1975).
Not used on MA State Geol. Map (Zen and others, 1983).
Revised to Brighton Volcanics (Durfee and others, 1987; 1990).
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