Usage:
Dynneson Sandstone Member of Mowry Shale (subsurface of MT, ND)
Dynneson Sand (MT-subsurface)
Geologic age:
late Early Cretaceous (Albian)
Type section, locality, area and/or origin of name:
Type section (subsurface): depth-interval 5,320 to 5,450 ft, Sun Dynneson No. 1 well, in sec. 30, T. 24 N., R. 58 E., Richland Co., MT (Wulf, 1962).
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 ([ ]).