U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database

Geologic Unit: West Rock

Usage:

West Rock Diabase (CT*)
West Rock Dolerite (CT*)


Geologic age:

Jurassic, Early*


Type section, locality, area and/or origin of name:

Type area: West Rock, New Haven quadrangle, New Haven Co., CT (Fritts, 1962).


AAPG geologic province:

New England province*
Hartford basin*


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).