Geologic Unit: Littleton
Littleton Formation (MA*,ME*,NH*,VT*)
Littleton Formation of Bolton Group (CT*)
Around Slate Ledge, Walker Mountain, and district lying 1 mi to southwest, Littleton Twp., Grafton Co., NH (Billings, 1935).
Informal Wild Goose grits (at base)
Unit Name History:
Named (Ross, 1923).
Revised (Billings, 1935).
Biostratigraphic dating (Boucot and Arndt, 1960).
MA State Geol. Map usage (Zen and others, 1983).
Age modified; Biostratigraphic dating (Elbert and others, 1988).
Age modified (Moench and Pankiwskyj, 1988).
Revised; Areal limits in MA and NH (Hatch and others, 1988).
Areal limits (Moench, 1990).
Overview (Eusden and Lyons, 1993).
Age modified; Biostratigraphic dating; Areal limits (Moench and others, 1995).
Revised (Greene, 1995).
NH State Geol. Map usage (Lyons and others, 1997).
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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