Usage:
Bear Den Member of Golden Valley Formation (ND)
Subunits:
(alphabetical) --all informal, in ND (local): Alamo Bluff lignite bed, Taylor bed.
Geologic age:
early Tertiary (late Paleocene)
Type section, locality, area and/or origin of name:
Type section: south of Blue Buttes on tributary of Bear Den Creek, about 12 km northwest of Mandaree, McKenzie Co., ND (Hickey, 1977).
Reference section (for Golden Valley Formation): south of town of Golden Valley, in W/2 NE/4 sec. 2, T. 143 N., R. 90 W., Mercer Co., ND (Hickey, 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 ([ ]).