Usage:
Granby Basaltic Tuff of Newark Supergroup (MA*)
Geologic age:
Jurassic, Early*
Type section, locality, area and/or origin of name:
Exposed 1.25 mi north of cemetery in Granby and 1 mi east of The Notch, Holyoke quadrangle, Hampshire Co., MA (Emerson, 1898).
AAPG geologic province:
New England province*
Hartford basin*
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 ([ ]).