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National Geologic Map Database

Geologic Unit: Popes Head

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 usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).