Geologic Unit: Putnam
Putnam Group (CT*,MA*)
Putnam Gneiss (CT)
Putnam, Windham Co., northeastern CT (Gregory, 1906).
(Group) Eastern part of eastern highlands: Quinebaug Formation and its lower, Black Hill, and upper members; Tatnic Hill Formation and its Bates Pond Lentil, Fly Pond and Yantic Members (CT*,MA*). Western part of eastern highlands: Monson Gneiss (CT*), Middletown Gneiss (CT*), Brimfield Schist and its lower, Daly Swamp, and upper members (CT*,MA*).
Unit Name History:
Named (Gregory, 1906). Not used (Zen and others, 1983). Age modified (Pease, 1989).
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Asterisks (*) indicate usage by the U.S. Geological Survey. Other usages by state geological surveys.
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U.S. Department of the Interior, U.S. Geological Survey, Reston, VA, USA
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Last modified: 15-Jan-2013