Usage:
Bullion Creek Formation of Fort Union Group (ND)
Geologic age:
early Tertiary (Paleocene)
Type section, locality, area and/or origin of name:
Type section: Red Hills section of J.W. Crawford, 1967 (Univ. North Dakota MS thesis), in SW/4 sec. 27, SE/4 sec. 28, NE/4 sec. 33, and NW/4 sec. 34, T. 137 N., R. 103 W., [approx. Lat. 46 deg. 38 min. 38 sec. N., Long. 103 deg. 40 min. 19 sec. W., Dry Bullion Creek 7.5-min quadrangle, Little Missouri National Grassland], Golden Valley Co., southwestern ND (Clayton and others, 1977).
Type area: within 15 km radius of Bullion Butte [located along Billings-Golden Valley Co. line, in sec. 18, T. 137 N., R. 102 W., Bullion Butte 7.5-min quadrangle, southwestern ND] (Clayton and others, 1977).
Named from Bullion Creek, 5 km north of type section, [Dry Bullion Creek 7.5-min quadrangle, Golden Valley Co., Little Missouri National Grassland, southwestern ND] (Clayton and others, 1977).
AAPG geologic province:
Williston basin
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 ([ ]).