USGS Visual Identifier
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Geologic Unit: Elbrook

Elbrook Dolomite (PA*,VA*,WV*)
Elbrook Dolomite of Conasauga Group (TN*)
Elbrook Formation (PA*,VA)
Elbrook Limestone (PA*,MD*,VA*,WV*)

Cambrian, Middle*
Cambrian, Late*

Geologic Province:
Appalachian basin*

Areal Extent:

Type Locality:
Elbrook, Franklin Co., south-central PA (Stose, 1906)

Unit Name History:
Named (Stose, 1906).
Used as Elbrook Formation (Stose, 1909).
Used as Elbrook Dolomite (Stose, 1922).
Extended into VA (Stose, 1928).
Extended into WV (Woodward, 1949).
Used in MD (Cloos, 1951).
Extended into TN (King and Ferguson, 1960).
Revised (Ryder, 1992).
Overview (Sloto, 1994).

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