Usage:
Ancaster Member of Goat Island Dolomite of Lockport Group (NY*)
Ancaster Member of Goat Island Formation of Lockport Group (Canada)
Geologic age:
late Silurian (Ludlow)*
Type section, locality, area and/or origin of name: (See Canadian Lexicon)
Type locality: a short distance east of the village of Ancaster along Highway 2, south of Dundas, Wentworth Co., Ontario, Canada (Bolton, 1957, Geol. Survey Canada Mem. 289, p. 49+, fig. 1).
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 ([ ]).