Usage:
Rising Bull Member of Grinnell Formation of Ravalli Group of Purcell Supergroup (Canada)
[?] Rising Bull Member of Grinnell Formation of Ravalli Group of Belt Supergroup (MT)
(Purcell Supergroup of Canada = Belt Supergroup of U.S.)
Geologic age:
Mesoproterozoic
Type section, locality, area and/or origin of name:
Upper cliffs of Mt. Rockwell, south of Two Medicine Lake, in Glacier National Park, MT (Fenton and Fenton, 1937).
AAPG geologic province:
Northern Rocky Mountain region
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 ([ ]).