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Geologic Unit: Meriden

Meriden Formation of Newark Supergroup (CT)
Meriden Group (CT)

Jurassic, Early

Geologic Province:
New England province
Hartford basin
Areal Extent:

Type Locality:
Lower sedimentary member: outcrop on south shore of Shuttle Meadow Reservoir, between Meriden and New Britain, New Haven Co., CT. Upper sedimentary member: quarry in Kensington, 1.5 mi (2.4 km) south of Berlin, Hartford Co., CT. Named from town of Meriden (Krynine, 1950).

GROUP STATUS (alphabetical) --all in CT: East Berlin Formation, Hampden Basalt. [Uncertain if following are current: Holyoke Basalt, Shuttle Meadow Formation, Talcott Basalt.]
FORMATION STATUS (alphabetical) --all in CT: Hampden Lava Member, Holyoke Lava Member, [?]Talcott Lava Member.

Unit Name History:
Named Meriden formation (Krynine, 1950).
Members named (Rodgers, 1959).
Members raised to formation rank (Lehmann, 1959).
Redescribed as Meriden Group (Sanders, 1968).
Revised to Meriden Formation of Krynine (1950) (Rodgers, 1985).

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
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Last modified: 15-Jan-2013