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National Geologic Map Database

Geologic Unit: Ancaster

Usage:

Ancaster Member of Goat Island Dolomite of Lockport Group (NY*)
Ancaster Member of Goat Island Formation of Lockport Group (Canada)


Geologic age:

early 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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).