Usage:
Rochester Shale of Clinton Group (MD*,NY*,PA*,WV)
Rochester Shale (MD,OH,WV*)
Rochester Shale Member of Clinton Formation (MI*)
Rochester Member of McKenzie Formation (WV)
Rochester Member of Mifflintown Formation (PA)
Subunits:
FORMATION STATUS (alphabetical) --all in NY: Burleigh Hill Member*, Gates Member, Glenmark Member, Lewiston Member*.
Geologic age:
early Silurian (Wenlock)*
Type section, locality, area and/or origin of name:
Type area: exposures at Rochester, Monroe Co., west-central NY (Hall, 1839).
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 ([ ]).