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t iGUBB 1 Index map of Arizona showing Gila County and other localities
Ages of older Precambrian granitic rocks in Arizona
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abundant acid ammonium hydroxide arkosic Barnes Conglomerate Member beaker biotite black facies blocky buff unit caldera Canyon carbon coarse grained cone contains crater cross-laminated crucible deposits diabase dikes Dripping Spring Dripping Spring Quartzite earthquakes eruption fault feet feldspar feldspathic fissure flaggy forms cliff forms ledges Gastil Gila County graben gray facies gray sandstone gray unit grayish orange pink Kilauea Kilauea caldera largely lava fountains layers lenses light gray massive matrix medium grained Mescal Limestone metamorphic middle member miles minerals moderate Mountain orthoclase orthoquartzite oxide Pahoa pale red pale-red percent Permian Permian and Triassic phyllite plagioclase platy precipitate pseudochannels quartz monzonite quartzite red unit ripple marks sample sandstone schist sections seismograph silica silt siltstone silty slabby solution stones strata stylolites sulfur surface Tenas Mary Creek thickness thin bedded Triassic tube upper member vent volcanic Wash weathers grayish orange weathers pale white quartzite marker white unit