No current usage.
(†Cassin Formation (NY,VT) is synonym of Fort Cassin Formation. See Fort Cassin.)
Early Ordovician
Old Fort Cassin, Addison Co., central VT (Cushing, 1905).
New England province
Adirondack uplift
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 ([ ]).