Usage:
Nesson Formation (MT*,ND*,SD*?)
Subunits:
(alphabetical): Kline Member (MT*,ND*), Picard Shale Member (MT*,ND*), Poe Evaporite Member (MT*,ND*).
Geologic age:
Jurassic, Early(?)*
Jurassic, Middle*
Type section, locality, area and/or origin of name:
Type section (subsurface): depth-interval 5,730 to 5,990 ft, Amerada No. 1 Clarence Iverson well, in center SW/4 SW/4 sec. 6, T. 155 N., R. 95 W., Williams Co., ND (Nordquist, 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 ([ ]).