No current usage.
(†Manitoba Group (subsurface of ND,MT?,SD?) not used in the U.S. See Dawson Bay and Souris River.)
Middle to Late Devonian (Givetian to Frasnian)
Probably named from province of Manitoba, Canada (Baillie, 1953).
Representative section (subsurface): depth-interval 3,845 to 4,355 ft (1,172 to 1,327.4 m), Imperial Davidson No. 1 well, in LSD 16-8-27-1 West of 3rd Meridian (W3M), Saskatchewan, Canada. [From CSPG Western Canada Lexicon]
Williston 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 ([ ]).