USGS Visual Identifier
National Geologic Map Database logo GEOLEX database

Geologic Unit: Roxbury

Roxbury Conglomerate of Boston Bay Group (MA*)

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

Areal Extent:

Type Locality:
Named from exposures in Roxbury, Boston area, eastern MA (Hitchcock, 1861).

(ascending) Brookline, Dorchester, and Squantum Members (MA*)

Unit Name History:
Named (Hitchcock, 1861).
Overview (Shaler, 1871).
Assigned to Boston Bay group (LaForge, 1932).
Age modified (Bailey and Newman, 1978; Goldsmith and others, 1982).
MA State Geol. Map usage (Zen and others, 1983).
Not used (Socci and Smith, 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