Usage:
Thorold Sandstone of Albion Group (NY)
Thorold Sandstone of Medina Group (NY*,PA)
Geologic age:
early Silurian (Llandovery)*
Type section, locality, area and/or origin of name: (See Canadian Lexicon)
Exposures on Welland Canal, at Thorold, Ontario, Canada (Grabau, 1913).
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 ([ ]).