Usage:
Gaddes Basalt of Ash Creek Group (AZ*)
Geologic age:
Paleoproterozoic*
Type section, locality, area and/or origin of name:
Not stated. Good exposures in Gaddes Canyon, south of Mingus Mountain, and in Black Canyon, Jerome area, Yavapai Co., central AZ. Named from Gaddes Canyon, Yavapai Co., AZ (Anderson and Creasey, 1958).
AAPG geologic province:
Southwestern Basin-and-Range region*
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 ([ ]).