Geologic Unit: Hatch Hill
Hatch Hill Formation (NY*,VT*)
Hatch Hill Formation of Mount Hamilton Group (VT)
Western flank of Hatch Hill, Thorn Hill quadrangle, Washington Co., eastern NY (Theokritoff, 1959).
Eagle Bridge Quartzite Member (NY,VT)
Unit Name History:
Named (Theokritoff, 1959).
NY State Geol. Map usage (Fisher and others, 1961).
VT State Geol. Map usage (Doll, 1961).
Age discussion (Zen, 1963; Doll, 1963).
Overview (Theokritoff, 1964).
Age modified (Zen, 1967; Cady, 1969).
NY State Geol. Map usage (Isachsen and Fisher, 1970).
Age modified; Member assigned (Potter, 1972).
Overview (Zen and others, 1983).
Revised (Fisher, 1984; Landing, 1988).
Areal limits; Age modified (Thompson, 1990).
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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