USGS Visual Identifier
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Geologic Unit: Weymouth

Weymouth Formation (MA*,RI*)
Weymouth Formation of Blue Hills Complex (MA)

Cambrian, Early*

Geologic Province:
New England province*

Areal Extent:

Type Locality:
Exposures north and east of Mill Cove at Weymouth, Norfolk Co., eastern MA (Emerson, 1917).

Unit Name History:
Named (LaForge, 1909).
Described at type locality (Emerson, 1917).
Assigned to Blue Hill Complex (Billings, 1982).
Extended into RI (Landing, 1988).
MA State Geol. Map usage (Zen and others, 1983).
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