Usage:
Hickory Grove Basalt of Culpeper Group of Newark Supergroup (VA*)
Geologic age:
Early Jurassic (Hettangian)*
Type section, locality, area and/or origin of name:
Type locality: along VA State Road 701, about 180 m (600 ft) N. 82 deg. W. of its intersection with U.S. Highway 15, near Hickory Grove, Middleburg 7.5-min quadrangle, Prince William Co., VA (Lee and Froelich, 1989).
AAPG geologic 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 ([ ]).