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Great Unconformity, Grand Canyon, AZ
Great unconformity. Nonconformity between Cambrian Tapeats Sandstone overlying Proterozoic Basement rock. Grand Canyon National Park, Arizona (260520-57)
Download ImageElves Canyon Gneiss, Grand Canyon, AZ
Elves Canyon (granitic) gneiss, the oldest rock of the Grand Canyon. Grand Canyon National Park, Arizona (260520-52)
Download ImageKink fold in sandstone, Grand Cyn, AZ
Kink fold in Tapeats Sandstone, Grand Canyon National Park, Arizona
Download ImageAngular Unconformity, Grand Canyon, AZ
Angular unconformity between tilted Proterozoic Unkar Group and overlying flat-lying Paleozoic sedimentary rock, Grand Canyon National Park, Arizona (260520-27)
Download ImageDikes and Vishnu Schist, Grand Cyn (Vertical)
Granitic dikes and Vishnu Schist, two of the main components of the Grand Canyon basement. Note the flat-lying Tapeats Sandstone at the top. (260519-112)
Download ImageDikes and Vishnu Schist, Grand Cyn
Granitic dikes and Vishnu Schist, two of the main components of the Grand Canyon basement. Note the flat-lying Tapeats Sandstone at the top. (260519-111) unconformity
Download ImageVishnu Schist, Grand Canyon, AZ
Proterozoic Vishnu Schist, the main component of the Grand Canyon basement, as exposed along the Colorado River (260519-91)
Download ImageZoroaster Temple and Colo River
Zoroaster Temple, made of Permian Coconino Sandstone and Paleozoic stratigraphy down to the Great Unconformity. Colorado River, Grand Canyon National Park, Arizona. (260519-84)
Download ImageVishnu Schist, Grand Canyon, AZ
Closeup View of Vishnu Schist, Grand Canyon, Arizona.
Download ImageUpper Granite Gorge, Grand Canyon, Arizona
Vishnu Schist and dikes of Zoroaster Granite along the Colorado River in Upper Granite Gorge of Grand Canyon National Park. The Great unconformity, of Tapeats Sandstone overlying the basement, is visible in the middle ground. (260519-71)
Download ImageHance Rapids and Asbestos Mine, G Cyn, AZ
Diabase sill in Proterozoic Bass Formation and Hance Asbestos Mine at Hance Rapids on the Colorado River, Grand Canyon National Park, Arizona. The asbestos formed through contact metamorphism (metasomatism) of the dolostone from intrusion of the diabase (260519-32)
Download ImageDebris Flow deposit, Arizona
Reverse grading in a debris flow deposit along Unkar Creek, Grand Canyon National Park, Arizona (260519-19)
Download ImageDebris Flow deposit, Arizona
Reverse grading in a debris flow deposit along Unkar Creek, Grand Canyon National Park, Arizona (260519-18)
Download ImageLittle Colorado River, and Pz strat, AZ
Calcium-carbonate laden water of the Little Colorado River, Grand Canyon National Park, Arizona. Rocks in background show the Paleozoic section from the Muav Limestone up through the Kaibab (260518-164)
Download Image260518-156
Mixing line between the calcium carbonate laden Little Colorado River and the Colorado River, Grand Canyon National Park, Arizona. (260518-156)
Download ImagePrecambrian Dox Fm., Grand Cyn AZ
Proterozoic Dox Formation and hikers above Unkar Rapids, Grand Canyon National Park, Arizona (260518-133)
Download ImageAngular Unconformity, Grand Canyon, AZ
Angular unconformity between tilted Proterozoic Dox Formation and Cardenas Basalt beneath flat-lying Tapeats Sandstone and overlying Paleozoic strata. Grand Canyon National Park, Arizona. (260518-124)
Download ImageColorado River and strata, Grand Canyon, AZ
Meandering Colorado River flowing over Proterozoic Unkar Group upstream from Upper Granite Gorge. The Paleozoic section forms the Tapeats Sandstone to the Kaibab Limestone is visible in the far cliffs above the dark green Cardenas Basalt, Grand Canyon National Park, Arizona. (260518-123)
Download ImageColorado River and strata, Grand Canyon, AZ
Meandering Colorado River flowing over Proterozoic Unkar Group upstream from Upper Granite Gorge. The Paleozoic section forms the Tapeats Sandstone to the Kaibab Limestone is visible in the far cliffs above the dark green Cardenas Basalt, Grand Canyon National Park, Arizona. (260518-121).
Download ImageColorado River, Grand Canyon, AZ
Meandering Colorado River flowing over Proterozoic Dox Formation of the Unkar Group upstream from Upper Granite Gorge. Grand Canyon National Park, Arizona. (260518-21.
Download ImageNormal fault, Grand Cyn, AZ
Normal fault: Proterozoic Cardenas Basalt (left) dropped down against Dox Formation of the Unkar Group (right) on the Colorado River in Grand Canyon National Park, Arizona (260518-110)
Download Image
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