Usage:
Graters Member of Passaic Formation (NJ*)
Graters Member of Brunswick Formation (NJ*,PA*)
/Graters Member of lower part of Brunswick Group (PA*)
Geologic age:
Triassic, Late*
Norian*
Type section, locality, area and/or origin of name:
Exposures in Landis Brook, west of the town of Graters Ford on Perkiomen Creek, Montgomery Co., PA (McLaughlin, 1933).
AAPG geologic province:
Piedmont-Blue Ridge province*
Newark 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 ([ ]).