Usage:
Orange Mountain Basalt of Brunswick Group (NJ*, NY*)
Orange Mountain Basalt of Newark Supergroup (NJ, NY)
Geologic age:
Jurassic, Early*
Hettangian
Type section, locality, area and/or origin of name:
Type section: exposures along U.S. Interstate Highway I-280 where it cuts through Orange Mountain, local name for First Watchung Mountain, East Orange, Essex Co., NJ (Olsen, 1980).
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 ([ ]).