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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).