Usage:
Frobisher-Alida interval (informal) in Mission Canyon Formation of Madison Group (ND-subsurface)
Informal. The rank or lithologic term should not be capitalized.
Subunits:
informal Rivil subinterval (ND-local).
Geologic age:
Early and/or Middle Mississippian (Tournaisian and/or Visean; Osagean)
Type section, locality, area and/or origin of name: (See Canadian Lexicon)
Named from producing intervals in Frobisher and Alida oil fields in southeastern Saskatchewan, Canada (Saskatchewan Geological Society, 1956).
Complete section (subsurface): depth-interval 4,162 to 4,537 ft, Imperial Workman No. 3-8 well, LSD 3-8-1-32, West of 1st Meridian (W1M), Saskatchewan, Canada (Saskatchewan Geological Society, 1956).
AAPG geologic province:
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 ([ ]).