Usage:
Hook Mountain Basalt of Brunswick Group of Newark Supergroup (NJ*)
Hook Mountain Basalt of Newark Supergroup (NJ)
Geologic age:
Jurassic, Early*
Hettangian*
Type section, locality, area and/or origin of name:
Type section: Exposure along U.S. Interstate Highway I-80 and Hook Mountain Road through the southern end of Hook Mountain, near Pine Brook, 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 ([ ]).