Usage:
Lewiston Member of Rochester Shale of Clinton Group (NY*)
Geologic age:
early Silurian (Wenlock)*
Type section, locality, area and/or origin of name:
Cliff exposures in the east wall of Niagara Gorge, 1 km (0.6 mi) south of the Lewiston-Queenston bridge and 0.6 km (0.4 mi) north of the Robert Moses power plant, 2.3 km (1.4 mi) south of Lewiston, Lewiston 7.5-min quadrangle, Niagara Co., NY (Brett, 1983).
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 ([ ]).