Usage:
Exshaw Formation (MT*)
Geologic age:
Late Devonian and Early Mississippian (late Famennian to middle Tournaisian)*
Type section, locality, area and/or origin of name: (See Canadian Lexicon)
Type locality: in Jura Creek, 1 mi east of Exshaw and 2 mi north of highway between Calgary and Banff, Alberta, Canada (Sandberg, 1967).
[Type section (corrected): in Jura Creek, 3.2 km (2 mi) north of Exshaw, Alberta; Lat. 51 deg. 05 min. 29 sec. N., Long. 115 deg. 09 min. 29 sec. W.; NTS 82O/3; eastern Rocky Mountain Front Ranges, southwestern Alberta (Lexicon of Canadian Geologic Units (accessed March 26, 2012); see also Richards and others, 1994).]
Named from town of Exshaw (Warren, 1937).
AAPG geologic province:
Sweetgrass arch*
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 ([ ]).