Clough Quartzite (ME*,MA*,NH*)
Clough Quartzite of Bolton Group (CT*)
Clough Formation (MA*,NH*,VT*)
early Early Silurian (Llandovery)*
Clough Hill district, Moosilauke quadrangle, central NH (Billings, 1934).
New England province*
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.
"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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).