Geologic Unit: Tower Hill
Tower Hill Quartzite of the Merrimack Group (MA*)
Tower Hill Quartizte (MA*)
Tower Hill, Main Street, Boylston, Shrewsbury 7.5-min quadrangle, Worcester Co., central MA. (Grew, 1970).
Unit Name History:
First used informally as Tower Hill quartzite member of the Boylston Formation (Grew, 1970).
Named (Goldsmith and others, 1982).
MA State Geol. Map usage (Zen and others, 1983).
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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