Geologic Unit: Claypit Hill
Claypit Hill Formation (MA*)
Along railroad between 0.1 and 0.4 mi (0.16 and 0.64 km) east of Claypit Hill Road, Middlesex Co., eastern MA (Nelson, 1974).
Unit Name History:
Named (Nelson, 1974).
Age modified (Goldsmith, 1980).
Not used on MA State Geol. Map (Zen and others, 1983).
Not used (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
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Last modified: 15-Jan-2013