Usage:
Monmouth Group (NJ*,PA*,NY*,DE,MD*)
Monmouth Formation (MD*,DC*)
Subunits:
(ascending) Mount Laurel Sand (NJ*,PA*,DE,MD), Navesink Formation (NJ*,DE), Red Bank Sand (NJ*,PA*,DE), Severn Formation (MD), Tinton Sand (NJ*,PA*), New Egypt Formation (NJ) of Monmouth Group; undifferentiated (NY*)
Geologic age:
Late Cretaceous (Maastrichtian)*
Type section, locality, area and/or origin of name:
Not designated. Named from Monmouth Co., NJ (Clark and others, 1897).
AAPG geologic province:
Atlantic Coast 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 ([ ]).