Usage:
Niagara Group (MI*,NY*)
Niagara Dolomite (IL,IA*,WI*)
Niagara Limestone (IL,IN,OH*)
Niagara Formation (IA,WI)
Subunits:
GROUP STATUS --all in MI: Guelph Dolomite, Lockport Dolomite.
Geologic age:
Silurian*
Type section, locality, area and/or origin of name:
Named from exposures in Niagara Co., NY, all of the subdivisions includes those of Guelph age, being well exposed in gorge of Niagara River.
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 ([ ]).