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National Geologic Map Database

Geologic Unit: Collingwood

Usage:

Collingwood Formation (MI*, PA?, and subsurface of WI*)
Collingwood Member of Lindsay Formation (Canada)


Geologic age:

Late Ordovician (Mohawkian)*
(In Canada, age is Mohawkian to Maysvillian.)


Type section, locality, area and/or origin of name: (See Canadian Lexicon)

Well exposed at Collingwood, on southern shore of Lake Superior, Ontario, Canada (Raymond, 1912).


AAPG geologic province:

Appalachian basin?
Michigan 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 ([ ]).