Usage:
Needles Range Group (NV*,UT*)
Needles Range Formation (NV,UT)
Subunits:
GROUP STATUS (alphabetical): /Cottonwood Wash Tuff (NV,UT*), Escalante Desert Formation (UT*), Lund Formation (NV*,UT*) or Lund Tuff (UT), Ripgut Formation (NV*,UT*), Ryan Spring Formation (NV,UT*), Wah Wah Springs Formation (NV*,UT*), Wallaces Peak Tuff (UT).
FORMATION STATUS (alphabetical): /Cottonwood Wash Tuff Member (NV,UT), Lund Tuff Member (NV,UT), Minersville Tuff Member (UT), Wah Wah Springs Member (UT) or Wah Wah Springs Tuff Member (NV,UT), Wallaces Peak Tuff Member (UT).
Geologic age:
Tertiary*
Oligocene*
Type section, locality, area and/or origin of name:
Exposures on east side of Needles Range, and south of Garrison-Milford Highway, Beaver Co., UT. Named from Needles Range (Mackin, 1960).
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 ([ ]).