Usage:
Pine Salt Member of Spearfish Formation (MT,ND,SD?)
Pine Member of Spearfish Formation (ND)
Geologic age:
Permian, Late
Triassic, Early
Type section, locality, area and/or origin of name:
Not designated. Present in subsurface. Presumably named from Shell Oil Company Pine unit 23-30 well, in NE/4 SE/4 sec. 30, T. 12 N., R. 57 E., Wibaux Co., MT (Zieglar, 1955).
Principal reference section (subsurface): depth-interval 5,237 to 5,432 ft, Carter Oil Company L.L. Johnson No. 1 well, in NW/4 sec. 9, T. 129 N., R. 106 W., Bowman Co., ND (Dow, 1967).
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 ([ ]).