Usage:
Popes Head Formation (VA*)
Subunits:
Old Mill Branch Metasiltstone Member (VA*), Station Hills Phyllite Member (VA*)
Geologic age:
Cambrian*
Ordovician
Type section, locality, area and/or origin of name:
Exposures along Popes Head Creek and adjacent tracks of the Southern [Norfolk and Southern] RR between Station Hills, Fairfax 7.5-min quadrangle, and the confluence of the creek with Bull Run, Manassas 7.5-min quadrangle, Fairfax Co., VA (Drake and Lyttle, 1981).
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 ([ ]).