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5689 images found

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Dikes 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

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Vishnu Schist, Grand Canyon, AZ

Proterozoic Vishnu Schist, the main component of the Grand Canyon basement, as exposed along the Colorado River (260519-91)

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Zoroaster 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)

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Vishnu Schist, Grand Canyon, AZ

Closeup View of Vishnu Schist, Grand Canyon, Arizona.

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Upper 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)

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Hance 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)

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Debris Flow deposit, Arizona

Reverse grading in a debris flow deposit along Unkar Creek, Grand Canyon National Park, Arizona (260519-19)

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Debris Flow deposit, Arizona

Reverse grading in a debris flow deposit along Unkar Creek, Grand Canyon National Park, Arizona (260519-18)

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Little 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)

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260518-156

Mixing line between the calcium carbonate laden Little Colorado River and the Colorado River, Grand Canyon National Park, Arizona. (260518-156)

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Precambrian Dox Fm., Grand Cyn AZ

Proterozoic Dox Formation and hikers above Unkar Rapids, Grand Canyon National Park, Arizona (260518-133)

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Angular 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)

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Colorado 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)

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