USGS Visual Identifier
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Geologic Unit: Oak Hall

Oak Hall Member of Benner Formation (PA)
Oak Hall Member or Linden Hall Formation (PA)
Oak Hall Member of Nealmont Limestone (PA)

Ordovician, Middle
Geologic Province:
Appalachian basin
Areal Extent:

Type Locality:
Along highway 322, 1 mile west of Tusseyville, 3 miles south of Centre Hall, and 6 miles east of Oak Hall. Named from Oak Hall, a village east of State College, Centre Co., PA (Kay, 1944).

Unit Name History:
Name proposed for member of Nealmont Limestone (Kay, 1944).
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