Usage:
Firemoon Limestone Member of Piper Formation of Ellis Group (MT*,ND*)
Geologic age:
Jurassic, Middle*
Bajocian*
Type section, locality, area and/or origin of name:
Type section (subsurface): depth-interval 4,618 to 4,687 [ft?], Murphy Corporation No. 1 Firemoon well, in center SE/4 SE/4 sec. 12, T. 30 N., R. 41 E., Valley Co., northeastern MT (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 ([ ]).