Usage:
Telegraph Pass Granite (AZ*)
Geologic age:
Tertiary, middle*
Type section, locality, area and/or origin of name:
Along summit road, 300 m north-northwest of Telegraph Pass, near center of Main Ridge of South Mountains, Maricopa Co., AZ. Named from Telegraph Pass (Reynolds, 1985).
Reference localities: (1) cuts along summit road, in NW/4 sec. 20, T. 1 S., R. 3 E.; and (2) outcrops in center sec. 17, T. 1 S., R. 3 E. (Reynolds, 1985).
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 ([ ]).