USGS Visual Identifier
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Geologic Unit: Buttress

Buttress Diabase (CT*)
Buttress Dolerite (CT)

Jurassic, Middle(?)*

Geologic Province:
Hartford basin
New England province
Areal Extent:

Type Locality:
800 ft northwest of Wilbur Cross Parkway tunnel (Fritts, 1963). Named from topographic feature known as The Buttress, which protrudes from the west side of West Rock Ridge, New Haven quadrangle, New Haven Co., CT (Fritts, 1962).

Unit Name History:
Named Buttress Diabase (Fritts, 1962). Described (Fritts, 1963). Redefined Buttress Dolerite; Age modified (Rodgers, 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