Usage:
Hole-In-The-Wall Tuff Member of Isom Formation (NV*,UT*)
Geologic age:
early Tertiary (Oligocene)*
Type section, locality, area and/or origin of name:
Type locality: east end of Hole-In-The-Wall Pass, [in sec. 29], T. 34 S., R. 12 W., [Three Peaks 7.5-min quadrangle], Iron Springs district, Iron Co., southwestern UT. Named from Hole-In-The-Wall Pass, 2 mi north of Isom Creek (type locality of Isom Formation), Iron Springs district, Iron Co., southwestern UT (Mackin, 1960; see also Averitt, 1967).
AAPG geologic province:
Great Basin province*
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 ([ ]).