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Geologic Unit: Napanee

Napanee Limestone (NY*)
Napanee Limestone of Trenton Group (NY)

Ordovician, Middle*
Geologic Province:
Appalachian basin*
Areal Extent:

Type Locality: (See Canadian Lexicon)
Type section: 1 mi north of Napanee Station, along Selby Creek in Lot 22, Conc. III, Richmond Twp., Lenox and Addington Co., Ontario, Canada (Kay, 1937).

Unit Name History:
Named Napanee Member of Rockland Formation (Kay, 1937).
Rank raised (Fisher, 1962).
Assigned to Trenton Group (Cameron and Mangion, 1977).
Overview (Fisher, 1977; Frey, 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