Usage:
Spellman Formation of Beekmantown Group (NY)
Geologic age:
Early Ordovician
Type section, locality, area and/or origin of name:
Named from exposures at Spellman Ledge, 1.5 mi south of Spellman Road at Beekmantown, in Rouses Point quadrangle, northeastern NY. Well exposed at Willsboro on Bouquet River and in field exposures, 4 mi south-southeast of Fort Ann (Fisher, 1962).
AAPG geologic province:
Appalachian basin
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 ([ ]).