Usage:
Poolesville Member of Manassas Sandstone of Culpeper Group of Newark Supergroup (MD*,VA*)
Geologic age:
Late Triassic (late Carnian to early Norian)*
Type section, locality, area and/or origin of name:
Type section: exposures along road cuts north and northeast of Poolesville, Montgomery Co., MD (Lee and Froelich, 1989).
Reference section: outcrops along the northern bluffs of the Potomac River extending west for 2 km (1.2 mi) from the mouth of Seneca Creek, Montgomery Co., MD.
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 ([ ]).