Liberty Hall Formation (VA*)
Liberty Hall Member of Edinburg Formation (VA)
Middle Ordovician (Blackriveran)*
Type area: exposures on east side of Massanutten syncline in vicinity of Lexington and Natural Bridge, VA. Named from old historic ruin constructed on and of this rock (Campbell, 1905).
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.
"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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).