Usage:
Missouri Breaks Formation of Interlake Group (MT?,ND)
Geologic age:
Silurian
Type section, locality, area and/or origin of name:
Type section (subsurface): depth-interval from 11,778 to 11,805 ft, Texaco Inc. No. 1 Missouri Breaks well, in SW/4 SE/4 sec. 10, T. 153 N., R. 96 W., McKenzie Co., ND (Megathan, 1987).
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 ([ ]).