Usage:
Minnelusa Formation (MT*,ND*,SD*,WY*)
Minnelusa Sandstone (MT*,NE*,SD*,WY*)
Minnelusa Group (ND)
Subunits:
FORMATION STATUS (alphabetical) --all in WY: Converse Sandstone Member, Leo Sandstone Member.
GROUP STATUS (alphabetical) --all in ND: Amsden Formation, Broom Creek Formation, Tyler Formation.
Geologic age:
Pennsylvanian to early Permian*
Type section, locality, area and/or origin of name:
Type section: along Rapid Creek, 4 to 5 mi west of Rapid City, [in sec. 18, T. 1 N., R. 7 E., Pennington Co., SD, Willison basin] (Darton and Paige, 1925).
AAPG geologic province:
Chadron arch*
Denver basin*
Powder River basin*
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 ([ ]).