Usage:
Blackwater Creek Rhyolite Member of Mechum River Formation (VA*)
Geologic age:
Neoproterozoic*
Type section, locality, area and/or origin of name:
Type locality: abandoned quarry, north side of VA Highway 615, 1.7 km (1.1 mi) south of intersection with VA Highway 617, Lat. 38 deg. 35 min. 30 sec. N., Long. 78 deg. 06 min. 08 sec. W., Castleton quadrangle, Rappahannock Co., central VA. Named from Blackwater Creek (Tollo, 1994).
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 ([ ]).