Usage:
Swift Run Formation (MD*,VA*,WV)
Geologic age:
Neoproterozoic*
Type section, locality, area and/or origin of name:
Exposures on U.S. Highway 33, just east of Swift Run Gap, VA [now inaccessible]. Also exposed on Skyline Drive just north of the gap (Stose and Stose, 1944).
Reference section: good exposures of sericitic phyllite believed to be metatuff can be seen from entrance of Skyline Drive eastward from the gap. Exposures from Whitehall, Albemarle Co., into Sugar Hollow, make good substitute for type locality and are near the now-inaccessible type (Furcron, 1969).
AAPG geologic province:
Piedmont-Blue Ridge province*
Appalachian 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 ([ ]).