Usage:
No current usage.
(†Cottonwood Wash Formation (AZ) considered obsolete. Replaced with Rainbow Gardens Member of Horse Spring Formation [now Rainbow Gardens Formation]. See Rainbow Gardens.)
Geologic age:
Late Cretaceous(?) or Eocene(?)
Type section, locality, area and/or origin of name:
Cottonwood Wash, in sec. 18, T. 37 N., R. 15 W., Mohave Co., AZ (Moore, 1972).
AAPG geologic province:
Plateau sedimentary 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 ([ ]).