USGS Visual Identifier
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Geologic Unit: Berkshire Valley

Berkshire Valley Formation (NJ*)

Silurian, Late*
Geologic Province:
Piedmont-Blue Ridge province*
Areal Extent:

Type Locality:
Exposures at southwest end of Longwood Lake, Morris Co., north-central NJ. Named from nearby town (Barnett, 1970).
Reference section: Exposures 400 ft southwest of the type section (Barnett, 1970).

Unit Name History:
First used (Barnett, 1967, Dissert. Abs., sec. B, v. 27, no. 9, p. 3145) [Not synopsized].
Named (Barnett, 1970).
Overview (Drake and others, in press).

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