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Geologic Unit: Mount Rogers

Mount Rogers Formation of Crossnore Complex (NC*,TN*,VA*)

Proterozoic, Late*

Geologic Province:
Piedmont-Blue Ridge province*
Appalachian basin*

Areal Extent:

Type Locality:
Occurs on Mount Rogers, highest peak in VA, located on Smyth-Grayson Co. line, 16.5 mi west of western boundary of Gossan lead district (Stose and Stose, 1944).

Fees Rhyolite Member (VA*), Buzzard Rock Member (VA*), Whitetop Rhyolite Member (VA*), Wilburn Rhyolite Member (VA*)

Unit Name History:
Named Mount Rogers volcanic series (Stose and Stose, 1944).
Revised; Areal limits (Rodgers, 1953).
Age modified (King and Ferguson, 1960).
Age modified; Isotopic dating (Rankin and others, 1969).
Revised; Age modified; Overview (Rankin, 1970).
Areal limits; Overview (Rankin and others, 1972).
Revised; Overview (Rankin and others, 1973).
Overview of correlation (Hurst, 1973).
Included in Crossnore Complex (Rankin and others, 1983).
Overview (Brown, 1985; Reed, 1993).
Revised, members named (Rankin, 1993).
VA Geol. Survey usage (Rader and Evans, 1993).
Age discussed (Rankin and others, 1993).
Isotopic dating (Aleinikoff and others, 1995).
[When referring to the Mount Rogers volcanic series of Stose and Stose (1944), please use informally. The practice of employing "series" for lithostratigraphic or lithodemic nomenclature is now regarded as improper (see ACSN, 1961, 1970; NACSN, 1983). The term "Series" is applied formally only to chronostratigraphic units.]

Note: If you need more information, please contact Nancy Stamm (
Asterisks (*) indicate usage by the U.S. Geological Survey. Other usages by state geological surveys.

"No current usage" implies that a name has been abandoned or that it has fallen into disuse. Former usage and, if known, replacement name given in parentheses ().

Slashes (/) indicate unit name usage violates the 1983 North American Stratigraphic Code. This violation may be explained within brackets ([ ]).

U.S. Department of the Interior, U.S. Geological Survey, Reston, VA, USA
Database project personnel
Last modified: 15-Jan-2013