Usage:
Waterfall Formation of Culpeper Group (VA*)
Subunits:
Millbrook Quarry Member*
Geologic age:
Jurassic, Early*
Sinemurian*
Pliensbachian*
Type section, locality, area and/or origin of name:
Outcrops near the community of Waterfall, especially in fields north of Virginia State Road 630, 0.3 km (0.2 mi) northwest of Waterfall, Prince William Co., VA (Lindholm, 1979).
AAPG geologic province:
Piedmont-Blue Ridge province*
Culpeper 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 ([ ]).