Usage:
Carefree Formation (AZ)
Subunits:
(alphabetical) --all in AZ: Church Member, Galloway Member, Grapevine Member, Naked Girl Canyon Member, Sombrero Member.
Geologic age:
Tertiary
Miocene, late
Pliocene, early
Type section, locality, area and/or origin of name:
Carefree basin, Cave Creek and Wildcat Hill quadrangles, northern Maricopa Co., central AZ. Named from town of Carefree (Doorn, Pewe, 1991).
AAPG geologic province:
Basin-and-Range 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 ([ ]).