Usage:
Robertson River Formation (VA)
Robertson River Igneous Suite (VA*)
Subunits:
Rivanna Granite (VA*), Laurel Mills Granite (VA*), Arrington Mountain Alkali Feldspar Granite (VA*), White Oak Alkali Feldspar Granite (VA*), Cobbler Mountain Alkali Feldspar Quartz Syenite (VA*), Hitt Mountain Alkali Feldspar Syenite (VA*), Amissville Alkali Feldspar Granite (VA*), Battle Mountain Alkali Feldspar Granite (VA*), and Deep Run Granite (VA) of Robertson River Igneous Suite.
Geologic age:
Neoproterozoic*
Type section, locality, area and/or origin of name:
Named from exposures along valley walls of Robertson [Robinson] River northeast of Madison, Madison Co., central VA (Allen, 1963).
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 ([ ]).