Ferguson, C.A., Gilbert, W.G., Pearthree, P.A., and Biggs, T.H., 2000, Geologic map of the southern Roskruge Mountains (the San Pedro and the southern half of La Tortuga Butte 7.5' quadrangles), Pima County, Arizona: Arizona Geological Survey Open-File Report 00-06, 40 p., 2 sheets, scale 1:24,000.
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Map, Bedrock, Surficial, Cross-section, Stratigraphy, Structure, Mineralization, Correlation, Geomorphology, Geochronology, Geochemical Survey, Igneous Petrology, Granitoid, Volcanic, Volcanology, [basalt of Brawley Wash][Brawley Wash basalt][basalt in Brawley Wash] - Miocene, [Roskruge Mtns. dike][Pictograph dike] - basalt of Brawley Wash(?), [Recortado tuff][Recortado ash flow][Recortado vitrophyre][Recortado welded tuff][welded tuff of Recortado Mountain][tuff of Recortado Mountain](Recortado Mt. vitrophyre)(Recortado Mtn. flow)(Recortado ash flows), (Three Points basaltic andesite), (Dobbs Buttes volcanics) - Miocene/Oligocene, trachyte porphyry of Martina Mountain, [La Tortuga Butte granodiorite][La Tortuga Butte pluton][diorite of La Tortuga Butte][porphyry of La Tortuga Butte], tuff of Sharp Peak - Cretaceous, Viopuli Tuff(Viopuli ignimbrite)(Viopuli red ignimbrite) - Roskruge Volcanics, [Confidence Peak tuff][tuff of Confidence Peak], tuff of San Pedro - Cretaceous or Jurassic, Pan Tak Granite(granite of Pan Tak) - Paleocene/Eocene, Sand Wells Fm - Jurassic(?)/Cretaceous(?), Roadside Fm - Jurassic - Artesa sequence, Cocoraque Fm, Roskruge Volcanics(Roskruge Rhyolite), (Dobbs Buttes Mbr - Roskruge Rhyolite), (Pescadero Mbr - Roskruge Rhyolite), Cat Mountain Tuff(Cat Mountain Rhyolite), Mission Road tuff, Sentinel tuff, Mount Wrightson Fm - Jurassic - Fresnal Canyon sequence,