Usage:
Ashern Formation of Elk Point Group (ND)
Geologic age:
late Silurian (Pridoli) to early Middle Devonian (Eifelian)
Type section, locality, area and/or origin of name: (See Canadian Lexicon)
Named from village of Ashern, near Lake Manitoba, Township 25, Range 7 West of Principal Meridian (WPM), Manitoba, Canada, Williston basin (Baillie, 1951).
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 ([ ]).