Usage:
Dunham Salt Member of Piper Formation (ND)
Dunham Salt Bed of Poe Member of Piper Formation (ND)
Dunham Salt (ND)
Geologic age:
Jurassic, Middle
Type section, locality, area and/or origin of name:
Not designated. Present in subsurface. Origin of name not stated, but probably named from its occurrence in the Hunt-Dunham No. 1 well, in NW/4 NW/4 sec. 24, T. 155 N., R. 90 W., Mountrail Co., ND (Zieglar, 1955).
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 ([ ]).