USGS Visual Identifier
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Geologic Unit: Valentine

Valentine Member of Benner Formation (PA)
Valentine Member of Curtin Limestone (PA)
Valentine Member of Linden Hall Formation (PA)

Ordovician, Middle
Geologic Province:
Appalachian basin
Areal Extent:

Type Locality:
Named from small hamlet and forge of Valentine near Bellefonte, Centre Co., PA (Field, 1919).

Unit Name History:
Named Valentine Formation (Field, 1919).
Revised to member of Curtin Limestone (Kay, 1943).
Revised to member of Linden Hall Formation (Rones, 1969).
Revised to member of Benner Formation (Berg and others, 1980).

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