Usage:
Culpeper Group of Newark Supergroup (MD*,VA*)
Subunits:
Manassas Sandstone and its Reston, Rapidan, Tuscarora Creek, and Poolesville Members; Balls Bluff Siltstone and its Leesburg Member; Tibbstown Formation and its Mountain Run and Haudricks Mountain Members; Catharpin Creek Formation and its Goose Creek Member; Mount Zion Church Basalt; Midland Formation; Hickory Grove Basalt; Turkey Run Formation; Sander Basalt; Waterfall Formation and its Millbrook Quarry Member.
Geologic age:
Triassic, Late*
Carnian, middle*
Carnian, late*
Norian*
Jurassic, Early*
Hettangian*
Sinemurian*
Pliensbachian*
Type section, locality, area and/or origin of name:
Not designated. Named from the Culpeper basin, VA and MD (Lindholm, 1979).
AAPG geologic province:
Piedmont-Blue Ridge province*
Culpeper basin*
Barboursville 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 ([ ]).