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Grand Canyon, Arizona (vertical)
View into Inner Gorge of Grand Canyon. Colorado River just visible at the bottom. Kaibab Limestone on the left. (180519-6)
Download ImageGrand Canyon, Arizona
View north over the Grand Canyon; Inner Gorge occupies the middle of the photo. The Great Unconformity appears at the top of the Inner Gorge beneath the Cambrian Tapeats Sandstone. Rocks in foreground belong to the Kaibab Limestone. (180519-5)
Download ImageAngular Unconformity, Grand Canyon (Pan)
Angular unconformity between the Cambrian Transgressive Sequence and tilted Proterozoic rock in the Grand Canyon, Arizona. The Tapeats Sandstone pinches out against the brown knob of Shinumo Quartzite on the right that persisted as an island during the Cambrian Transgression. (180518-107)
Download ImageAngular Unconformity, Grand Canyon
Angular unconformity between the Cambrian Transgressive Sequence and tilted Proterozoic rock in the Grand Canyon, Arizona. The Tapeats Sandstone pinches out against the brown knob of Shinumo Quartzite on the right that persisted as an island during the Cambrian Transgression. (180518-107) sedimentary, Grand Canyon National Park, stair-step topography, erosion
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Paleozoic sedimentary rock, Grand Canyon, Arizona –view of the Cambrian Muav Limestone up to the Permian Kaibab Formation. (180518-104)
Download ImageMississippian Redwall LImestone, Grand Canyon, AZ
Mississippian Redwall LImestone and overlying (red-colored) Supai Formation, Grand Canyon, Arizona (180518-103)
Download ImageOverturned cross-bedding in sandstone.
Overturned cross-bedding in sandstone (180518-91)
Download ImageAngular Unconformity, Grand Canyon, Arizona
Angular unconformity between the Cambrian Bright Angel Shale and overlying Paleozoic rocks and tilted Proterozoic sedimentary rocks in the Grand Canyon, Arizona. (180518-87)
Download ImageRock Avalanche deposit (vertical)
Rock Avalanche deposit in the Grand Canyon, Arizona. (180518-63)
Download ImageRock Avalanche deposit (vertical)
Rock Avalanche deposit in the Grand Canyon, Arizona. (180518-61)
Download ImageAngular Unconformity, Grand Canyon (vertical)
Angular unconformity between the Cambrian Tapeats and overlying Paleozoic rocks and tilted Proterozoic Hakatai Shale in the Grand Canyon, Arizona. (180518-54)
Download ImageAngular Unconformity, Grand Canyon (vertical)
Angular unconformity between the Cambrian Tapeats and overlying Paleozoic rocks and tilted Proterozoic Hakatai Shale in the Grand Canyon, Arizona. (180518-54)
Download ImageImbricated rip-up clasts
Imbricate rip-up clasts in Proterozoic Bass Formation, Grand Canyon, Arizona. (180518-44)
Download ImageRip-up clasts in sandstone
Rip-up clasts of algal limestone in Proterozoic sandstone of Bass Formation, Grand Canyon, Arizona (180518-43)
Download ImageRip-up clasts in sandstone
Rip-up clasts of algal limestone in Proterozoic sandstone of Bass Formation, Grand Canyon, Arizona (180518-41)
Download ImageAngular Unconformity, Grand Canyon
Angular unconformity between the Cambrian Tapeats Sandstone and Bright Angel Shale and tilted Proterozoic rock in the Grand Canyon, Arizona. The Tapeats pinches out against the brown knob of Shinumo Quartzite that persisted as an island during the Cambrian Transgression. (180518-27)
Download ImageAngular Unconformity, Grand Canyon
Angular unconformity between the Cambrian Tapeats Sandstone and Bright Angel Shale and tilted Proterozoic rock in the Grand Canyon, Arizona. The Tapeats pinches out against the brown knob of Shinumo Quartzite that persisted as an island during the Cambrian Transgression. (180518-21)
Download ImageSpokane Falls, Spokane, Washington
Waterfall on the Spokane River and Miocene Grande Ronde Basalt at Spokane Falls, Washington. (180524-13)
Download Imagetilted fault blocks, Death Valley, California
Photo and diagram illustrating crustal extension, normal faults, and tilted fault blocks in Death Valley, California. (180311-19; d180507)
Download ImageJurassic ammonites
Dactylioceras, a Lower Jurassic Ammonoid Cephalopod. Photo is about 10 cm across. From the museum collection at Appalachian State University. (180427-61)
Download ImageDeformed metaconglomerate
Deformed metaconglomerate. Quartzite clast in upper left is cut by 2 generations of veins. From the rock garden of Appalachian State University. (180427-2)
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