Usage:
Elk Point Group (subsurface of MT*,ND*,SD*)
Elk Point Formation (subsurface of MT*,ND*,SD*)
Subunits:
GROUP STATUS (alphabetical): Ashern Formation (MT,ND), Elm Point Formation (ND), Interlake Formation (ND), Prairie Formation (MT*,ND*), Winnipegosis Formation (MT*,ND*,SD).
Geologic age:
Middle Devonian*
Type section, locality, area and/or origin of name: (See Canadian Lexicon)
Wells in Elk Point area, Township 56 and 57, Range 5 and 6 West of 4th Meridian (W4M), Alberta, Canada (CSPG Yukon Territory and District of Mackenzie and CSPG Western Canada lexicons).
[?] Either type section --or-- type equivalent (subsurface): depth-interval 2,844 [or 2,845?] to 4,430 ft, Anglo-Canadian Elk Point No. 11 well, LSD 2-21-57-5 West of 4th Meridian (W4M), Alberta, Canada (Crickmay, 1954; CSPG Yukon Territory and District of Mackenzie and CSPG Western Canada lexicons).
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 ([ ]).