Usage:
Chadakoin Formation (NY,PA)
Chadakoin Formation of Arkwright Group (NY)
Chadakoin Formation of Conneaut Group (NY)
Geologic age:
Late Devonian
Type section, locality, area and/or origin of name:
Quarries at Dexterville (Jamestown) on Chadakoin River, Chautauqua Co., western NY (Chadwick, 1924).
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 ([ ]).