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National Geologic Map Database

Geologic Unit: Ball Mountain

Usage:

Ball Mountain Formation of Lynchburg Group (VA*)


Subunits:

Johnson Mill Member (VA*).


Geologic age:

Late Proterozoic*


Type section, locality, area and/or origin of name:

Type locality: exposures on Ball Mountain south of the Rockfish River, Schuyler 7.5-min quadrangle, Nelson Co., VA (Wehr, 1985).


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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).