USGS Visual Identifier
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Geologic Unit: Dolly Ridge

Dolly Ridge Formation of Trenton Group (WV*,VA*)

Ordovician, Middle*
Geologic Province:
Appalachian basin*

Areal Extent:

Type Locality:
Southeastern side of Dolly Ridge, on R.L. Phares Farm, 1.3 km southeast of Riverton, Pendleton Co., WV (Perry, 1972).

Unit Name History:
Named (Perry, 1972). Areal limits (Ryder, 1992a). Age modified (Ryder, 1992b; Ryder and others, 1992). Overview (Haynes, 1992).

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