First published use in Santa Catalina Mountains, Pima Co, AZ, Basin-and-Range province. [Intent to name not stated. Under Articles 3 and 13c,e of 1970 Code of Stratigraphic Nomenclature, which was code in effect at time of this publication, a name introduced in a guidebook is considered to be informal.] Type locality designated as Wilderness of Rocks, for which unit was probably named, located within drainage basin of Lemmon Creek immediately south of Mt. Lemmon within Santa Catalina Mountains. Consists of typically white, garnet-rich, muscovite-biotite granite. Grades downward and southward into cataclastic Windy Point gneiss [first used; informal] and northward and upward into garnet-free biotite-muscovite granite or Lemmon Rock leucogranite complex [first used; informal]. Contacts between Wilderness and other rock units have not been reported. U-Th-Pb dates on monazite yield ages of 44-47 m.y.

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

Referred to [informally] as "granite" and "suite". Underlies 65% of area of Santa Catalina-Rincon-Tortolita crystalline complex. Wilderness suite consists of five sheet-like and laccolith-shaped muscovite granite plutons: Derrio Canyon granite; Wilderness granite and associated Lemmon Rock leucogranite; Youtcy granite; Espiritu Canyon granite; and Wrong Mountain granite. Uses term "granite" to these plutons to emphasize their unique mineralogy. Thickness is about 4.5 km. Intrudes Leatherwood quartz diorite and Chirreon Wash granodiorite; older than middle Tertiary quartz monzonites of Catalina suite. Mineralogy (table 4). Emplaced 44 to 50 m.y. B.P. (Eocene).

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