Usage:
Cottonwood Wash Tuff of Needles Range Group (NV*, UT*)
Cottonwood Wash Tuff Member of Needles Range Formation (NV*,UT)
Geologic age:
Oligocene*
Type section, locality, area and/or origin of name:
Cottonwood Wash, on east side of sec. 4, T. 26 S., R. 18 W., Beaver Co., UT (Best and others, 1973).
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 ([ ]).