Usage:
Johnson Mill Member of Ball Mountain Formation (VA*)
Johnson Mill Formation of Lynchburg Group (VA)
Johnson Mill Graphite Schist (VA)
Geologic age:
Neoproterozoic*
Type section, locality, area and/or origin of name:
Johnson Mill on VA Highway 712 on Hardware River, 2.7 mi southeast of North Garden on Southern RR, south-central Albemarle Co., central VA. Named from Johnson Mill (Nelson, 1962).
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 ([ ]).