Riggs, N.R., and Haxel, G.B., 1990, The Early to Middle Jurassic magmatic arc in southern Arizona: Plutons to sand dunes, in Gehrels, G.E., and Spencer, J.E., eds., Geologic excursions through the Sonoran Desert Region, Arizona and Sonora, Geological Society of America, Cordilleran section, 86th Annual Meeting, Tucson Ariz., March 14-16, 1990, Field-Trip Guidebook: Arizona Geological Survey Special Paper 7, p. 90-103.
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Road Log, Figure, Bedrock, Eolian Sedimentary, Granitoid, Volcanic, Volcanology, Areal, Structure, Stratigraphy, Igneous Petrology, Metamorphic Petrology, Geochemical Survey, diorite of Sulfrido - Tertiary, (quartz diorite of San Luis Wash)diorite of Sulfrido, (quartz monzonite of San Luis Wash)diorite of Sulfrido, [Presumido Peak granite][Presumido Peak monzogranite][granite of Presumido Peak][Presumido Peak pluton] - Eocene, granite of Durazno(alaskite of Las Guijas Mountains) - Jurassic, (granitic rocks of Las Guijas Mountains)granite porphyry of Las Guijas, strata of Cobre Ridge(Cobre Ridge Tuff) - Jurassic - Fresnal Canyon sequence, tuff of Pajarito(Pajarito lavas), Las Guijas andesite - Cretaceous,