Usage:
Gordon Shale (MT*)
Geologic age:
Middle Cambrian*
Type section, locality, area and/or origin of name:
Type locality: on Gordon Creek, 6 mi from South Fork of Flathead River, Ovando quadrangle, Powell Co., central western MT (Walcott, 1917).
AAPG geologic province:
Montana folded belt*
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 ([ ]).