USGS Visual Identifier
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Geologic Unit: Hope Valley

Hope Valley Alaskite Gneiss of Sterling Plutonic Suite (RI*,CT*,MA*)

Proterozoic, Late*

Geologic Province:
New England province*

Areal Extent:

Type Locality:
Exposures on low knobs 1 mi north of village of Hope Valley, Hope Valley quadrangle, Washington Co., southern RI (Moore, 1958).
Particularly well exposed on one of these knobs known as Goat Rock. Widespread in southern part of state.

Unit Name History:
Named (Moore, 1958).
Age modified (Williams, 1964; Goldsmith, 1967; Goldsmith, 1980).
Extended into CT (Feininger, 1965).
Revised (Goldsmith, 1966).
Extended into MA; Age modified (Goldsmith, 1982).
MA State Geol. Map usage (Zen and others, 1983).
Revised (Hermes and Zartman, 1985).
Overview (Skehan and Rast, 1990).
Overview; Isotopic dating (Wones and Goldsmith, 1991).

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