Usage:
Sunburst Sandstone Member of Kootenai Formation (MT*)
Geologic age:
Early Cretaceous*
Type section, locality, area and/or origin of name:
Type section (subsurface): depth-interval 1,220 to 1,245 feet (372 m to 380 m), Johnson No. 1, Johnson "D" well, in NW/4 NW/4 sec. 32, T. 35 N., R. 1 W., Kevin-Sunburst dome, Toole Co., MT (Rice, 1976).
AAPG geologic province:
Central Montana uplift*
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 ([ ]).