USGS Visual Identifier
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Geologic Unit: Hitchcock

Hitchcock Volcanics of Newark Supergroup (MA*)

Jurassic, Early*

Geologic Province:
New England province*
Hartford basin*
Areal Extent:

Type Locality:
Crops out on the north and west slopes of Mount Hitchcock, Holyoke Range, Mount Holyoke quadrangle, Hampshire Co., MA (Robinson and Luttrell, 1985).

Unit Name History:
First used (Bain, 1941). Named (Brophy and others, 1967). Revised; Age modified (Robinson and Luttrell, 1985).

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