Usage:
Moulton Member of Kootenai Formation (MT*)
Geologic age:
Early Cretaceous*
Type section, locality, area and/or origin of name:
Type section (subsurface): depth-interval 2,388 to 2,485 ft (728 m to 757 m), Montana Power Farbo No. 4 well, in SW/4 NW/4 SE/4 sec. 3, T. 37 N., R. 4 W., Glacier Co., MT. Occurs in the North Cut Bank field area on the northwest plunge of North Arch in north-central MT. Origin of name not stated by author (Oakes, 1966).
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 ([ ]).