USGS Visual Identifier
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Geologic Unit: East Berlin

East Berlin Formation of Newark Supergroup (CT*,MA*)
East Berlin Formation of Meriden Group (CT)

Jurassic, Early*

Geologic Province:
New England province*
Pomperaug basin*
Hartford basin*
Areal Extent:

Type Locality:
Roadcuts on CT Highway 72, northeast of Berlin and west of the village of East Berlin, Middletown quadrangle, Hartford Co., CT (Sanders, 1968).

Unit Name History:
Named East Berlin formation of the Newark group (Lehmann, 1959).
Overview (Schnabel, 1960).
Extended into MA (Colton and Hartshorn, 1966).
Revised to East Berlin Formation of the Meriden Group (Sanders, 1968).
Biostratigraphic dating (Cornet, 1977).
MA State Geol. Map usage (Zen and others, 1983).
Revised to East Berlin Formation of the Newark Supergroup (Robinson and Luttrell, 1985).
CT State Geol. Map usage (Rodgers, 1985).
Overview (Gierlowski-Kordesch and Rust, 1994).

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