Usage:
Fort Johnson Dolomite (NY)
Fort Johnson Member of Tribes Hill Formation (NY)
Geologic age:
Early Ordovician
Type section, locality, area and/or origin of name:
Abandoned quarry and West Shore RR cut 2 mi east of Fort Hunter, Montgomery Co., east-central NY. Named from village of Fort Johnson on north side of Mohawk River northeast of Fort Hunter (Fisher, 1954).
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 ([ ]).