Geologic Unit: Greylock
Greylock Schist (MA*,VT).
Exposures on Mount Greylock, Berkshire Co., northern MA (Dale, 1891).
Unit Name History:
Named Greylock schists (Dale, 1891).
Redescribed as Greylock Schist; Age modified (Herz, 1958).
Extended into VT (Thompson, 1959).
Age modified (Ratcliffe, 1979).
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