Usage:
Lynchburg Formation (VA)
Lynchburg Group (VA*)
Subunits:
GROUP STATUS (alphabetical) --all in VA: Alligator Back Formation, Ashe Formation, Ball Mountain Formation*, Bunker Hill Formation*, Charlottesville Formation, Fauquier Formation, Johnson Mill Formation, Moneta Gneiss, Monumental Mills Formation*, Thorofare Mountain Formation.
FORMATION STATUS: Rockfish Conglomerate Member (VA).
Geologic age:
Precambrian*
Proterozoic, Late*
Cambrian
Type section, locality, area and/or origin of name:
Lynchburg, central VA (Jonas, 1927).
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 ([ ]).