Usage:
West River Shale Member of Genesee Formation (NY*,WV*,OH*,PA*,MD*)
West River Shale of Genesee Group (NY)
Subunits:
Penn Yan Shale Member or Penn Yan Tongue (NY), Milo Tongue (NY).
Geologic age:
Late Devonian*
Type section, locality, area and/or origin of name:
Type area: Canadaigua Lake, western NY. Named from exposures in West River valley, Yates Co., NY.
Reference section: exposures in Seneca Point Gully on west side of Canandaigua Lake, 9 mi north of Naples, Ontario Co., NY.
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 ([ ]).