Usage:
Newark Supergroup (NJ*,CT*,MD*,MA*,NY*,NC*,PA*,SC*,VA*)
Newark Group (PA)
Subunits:
For unit names see Luttrell (1989).
Geologic age:
Triassic, Middle*
Triassic, Late*
Jurassic, Early*
Type section, locality, area and/or origin of name:
Not designated. Named from outcrops at and around Newark, Essex Co., NJ (Redfield, 1856).
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 ([ ]).