Usage:
Trenton Group (NY*,PA*,WV*)
Trenton Limestone (GA*,IL*,IN*,KY*,MI*,NY*,OH*,PA*,TN*,VT*,VA*,WV)
Trenton Formation (MI,NY)
Trenton Limestone of Chickamauga Group (TN)
Subunits:
GROUP STATUS (alphabetical): in NY: Canajoharie Shale (NY*) or Canajoharie Formation (NY), Cobourg Limestone (NY*) or Cobourg Formation (NY?), Coburn Formation (PA*), Denley Limestone (NY), Dolly Ridge Formation (WV*), Hillier Limestone (NY), Iberville Shale (NY), Kings Falls Limestone (NY), Kirkfield Formation (NY) or Kirkfield Limestone (NY), Moccasin Limestone (WV), Napanee Limestone (NY), Nealmont Formation (PA*,WV*), Orwell Limestone (VT*), Rockland Limestone (NY), Salona Formation (PA*) or Salona Limestone (PA), Selby Limestone (NY*), Sherman Fall Formation (NY), Shoreham Formation (NY) or Shoreham Limestone (VT), Steuben Limestone (NY), Stony Point Shale (NY,VT) or Stony Point Formation (VT), Sugar River Limestone (NY).
FORMATION STATUS (alphabetical) --all in MI: Chandler Falls Member, Groos Quarry Member.
Geologic age:
Late Ordovician (Mohawkian)*
Type section, locality, area and/or origin of name:
Named from Trenton Falls, Oneida Co., NY (Vanuxem, 1838).
AAPG geologic province:
Appalachian basin*
Cincinnati arch*
Illinois basin*
Michigan basin*
New England province*
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 ([ ]).