Usage:
Ludlowville Shale of Hamilton Group (NY*,PA*,OH*,WV*,MD*)
Ludlowville Formation of Hamilton Group (NY*,PA*)
Subunits:
Centerfield (NY*,PA*,MD*,OH*,WV*), Ivy Point (NY*), Jaycox (NY*), King Ferry (NY), Ledyard (NY), Otisco (NY*), Owasco (NY), Spafford (NY), Spring Brook (NY), Stone Mill (NY), and Wanakah (NY*) Members
Geologic age:
Middle Devonian*
Type section, locality, area and/or origin of name:
Named from exposures at Ludlowville, Tompkins Co., west-central NY (Hall, 1839).
Reference section: sequence on Paines Creek at Aurora beginning with Centerfield at Moonshine Falls and terminating with Portland Point beds at Black Rock, Erie Co., NY (Cooper, 1930).
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 ([ ]).