Usage:
Dunkirk Shale of Canadaway Group (NY)
Dunkirk Shale (PA)
Dunkirk Shale Member of Perrysburg Formation (NY*,OH*,PA*,WV*)
Dunkirk Shale Tongue of Huron Member of Chattanooga Shale (VA)
Geologic age:
Late Devonian (early Famennian)*
Type section, locality, area and/or origin of name:
Named from Dunkirk, Chautauqua Co., western NY (Hartnagel, 1912).
Type section: Point Gratiot, town of Dunkirk, on Lake Erie shoreline, Chautauqua Co., Dunkirk quadrangle, western NY [Rickard, 1975].
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 ([ ]).