USGS Visual Identifier
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Geologic Unit: Jacksonburg

Jacksonburg Formation (NJ,PA)
Jacksonburg Limestone (NJ*,PA*)

Ordovician, Middle*

Geologic Province:
Appalachian basin*

Areal Extent:

Type Locality:
Named from occurrence at Jacksonburg, Warren Co., northwestern NJ (Kummel, 1908).

Unit Name History:
Named (Kummel, 1908).
Overview (Miller, 1937).
Extended into PA (Gray, 1951).
PA State Geol. Map usage (Berg and others, 1980).
Overview in NJ (Monteverde, 1992).
Biostratigraphic dating (Repetski and others, 1995).

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