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National Geologic Map Database

Geologic Unit: Meriden

Usage:

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


Subunits:

GROUP STATUS (alphabetical)
--all in CT (Hartford basin): East Berlin Formation, Hampden Basalt [uncertain if following are current: Holyoke Basalt, Shuttle Meadow Formation, Talcott Basalt];
--all in VA* (Culpeper basin): Hickory Grove Basalt, Midland Formation, Sander Basalt, Turkey Run Formation.

FORMATION STATUS (alphabetical) --all in CT: Hampden Lava Member, Holyoke Lava Member, [?]Talcott Lava Member.


Geologic age:

Early Jurassic*


Type section, locality, area and/or origin of name:

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).


AAPG geologic province:

New England province
Piedmont-Blue Ridge province*


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates published by U.S. Geological Survey authors.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).