Usage:
Bakken Formation (MT*,ND*)
Bakken Formation of Three Forks Group (MT)
Geologic age:
Late Devonian to Early Mississippian (Famennian to Kinderhookian)*
Type section, locality, area and/or origin of name:
Type section (subsurface): depth-interval 9,615 to 9,720 ft, Amerada Petroleum Corp. H.O. Bakken No. 1 well, in SW/4 NW/4 sec. 12, T. 157 N., R. 95 W., Willliams Co., ND (Nordquist, 1953).
Reference section (subsurface): depth-interval 10,035 to 10,095 ft, Socony Vacuum Oil Company C. Dvorak No. 1 well, in SE/4 NE/4 sec. 6, T. 141 N., R. 94 W., Williston basin, Dunn Co., [ND] (Kume, 1963).
[North Dakota Geol. Survey considers type to be Shell Oil Company, Young Bear No. 32-4 well, in SW/4 NE/4, T. 148 N., R. 92 W.; API: 33-025-00347-00-00.]
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 ([ ]).