Usage:
Dunham Dolostone (VT*)
Dunham Dolomite (VT*)
Dunham Formation (VT)
Dunham Dolomite Member of Bridgeman Hill Formation (VT)
Geologic age:
Early Cambrian*
Type section, locality, area and/or origin of name: (See Canadian Lexicon)
Oak Hill, Sutton quadrangle, Quebec, Canada. Named from nearby town of Dunham (Clark, 1936).
AAPG geologic province:
New England province*
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates published by U.S. Geological Survey authors.
"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).
Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).