Geologic Unit: Ponaganset
Ponaganset Gneiss (RI*,MA*)
Ponaganset Gneiss of Sterling Plutonic Suite (RI*,CT*,MA*)
Ponaganset Granite Gneiss (RI,MA)
Exposures around Ponaganset Reservoir, Chepachet quadrangle, Providence Co., western RI (Quinn, 1967).
Unit Name History:
Named (Quinn, 1967).
Age modified; Assigned to Sterling Plutonic Group (Goldsmith, 1980).
Extended into MA; Age modified; Revised (Goldsmith and others, 1982).
MA State Geol. Map usage (Zen and others, 1983).
Removed from Suite; Areal limits; Overview (Skehan and Rast, 1990).
Overview (Wones and Goldsmith, 1991).
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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