Usage:
No current usage.
(†Bull Run Formation of Culpeper Group of Newark Supergroup (VA,MD) abandoned.)
Geologic age:
Late Triassic
Type section, locality, area and/or origin of name:
Not designated. Named from Bull Run, a small stream in the Bull Run Battlefield, 6 mi (9.5 km) west of Manassas, Prince William and Fairfax Cos., VA (Roberts, 1928).
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 ([ ]).