Pg. 9, 63-65, pl. 5. Cochise Peak quartz monzonite. Generally light-greenish-gray, weathering to rather dark-grayish-brown colors. Generally spangled with conspicuous flesh-colored crystals of microcline as much as 4 cm long. Abundance of crystals ranges greatly. In places, rock grades into mylonites. Most contacts are faults and thus give little direct clue to original intrusive relations. Older than Stronghold granite with which it is in contact in three areas of Pearce quadrangle. Age is Triassic or Jurassic. Report includes geologic map.
Crops out in belt extending from northern side of Cochise Peak, in T. 18 S., R. 23 E., south-southeastward for nearly 3 mi, to the divide at Middle Pass, Dragoon Mountains, central Cochise Co., southeastern AZ. Belt ranges in width from about 1,000 feet to nearly 0.5 mi. Numerous other small bodies and blocks recognized in area but are too small to be mapped.

Source: US geologic names lexicon (USGS Bull. 1200, p. 862).

Previously reported intrusive relations with Bolsa Quartzite [Cambrian] are viewed as equivocal. Rather, a basal quartzite-pebble conglomerate between the Bolsa Quartzite and underlying [Cochise Peak] granite provide strong evidence for a Precambrian age assignment.

Source: GNU records (USGS DDS-6; Denver GNULEX).

Not mentioned by name but outcropping rocks named Cochise Peak Quartz Monzonite by Gilluly (1956) of Triassic or Jurassic age shown as granitoid rocks of Precambrian Y age in Pedregosa basin.

Source: GNU records (USGS DDS-6; Denver GNULEX).