Weathering and Erosion
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Multiple landslide tracks, SE Alaska
Multiple landslide tracks, SE Alaska (150622-27)
Download ImageRocky coastline and breaking wave, Iceland
Rocky coastline with seastack and breaking wave, SW Iceland (180912-49)
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Rock Avalanche deposit (vertical)
Rock Avalanche deposit in the Grand Canyon, Arizona. (180518-63)
Download ImageArch in granitic rock, CA
Arch in Cretaceous granodiorite. Mobius Arch, SE California. (180314-120)
Download ImageLandslide triggered by Earthquake, New Zealand
Landslide, triggered by November, 2016 M7.8 Kaikoura Earthquake, New Zealand. (180124-93f)
Download ImageSeastack and shorebirds
Seastack and shorebirds (Gannets), North Island, New Zealand. (180106-13)
Download ImageLandslide hummocks in volcanic crater
Landslide hummocks in active crater of White Island, New Zealand (180110-24)
Download ImagePaleosol beneath andesite flow, New Mexico
Paleosol beneath Pliocene-age andesite lava flow, New Mexico. Note basal flow breccia. (160911-26)
Download ImageHogback Ridges near Mora, New Mexico
Aerial view of hogback ridges near Mora, New Mexico. Rock is Pennsylvanian through Cretaceous (west, left to east, right) (171218-45)
Download ImageSandstone cliff and fallen rocks, Nevada
Cliff of Jurassic Aztec Sandstone and fallen blocks. Valley of Fire State Park, Nevada. 171217-51.
Download ImageSandstone tower, Arizona (vertical)
Erosional remnant showing effects of differential weathering and erosion, Monument Valley, AZ. Cliff-forming rock is Permian De Chelly Sandstone (eolian); slope-former is Permian Organ Rock Shale. (090321-55f)
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Talus and basalt scablands, Washington
Talus and the Twin Sisters, scablands remnants from erosion by the Missoula Floods, Washington (150702-101)g
Download ImageCorestone in granitic rock, Montana
Corestone, formed by spheroidal weathering in granitic rock, Montana (170528-4)
Download ImageGrus, disintegrated granitic rock, Montana
Grus, small angular fragments of granitic material formed by chemical (hydrolysis) and mechanical weathering of granitic rock, Montana. Slope of deposit approximates the angle of repose for this material. (170528-3)
Download ImageGranitic core stones, Montana
Spheroidal weathering of granitic rock, forming corestones, Montana. (170528-26)
Download ImageDifferential erosion of sandstone vs shale, Utah.
The sandstone beds are more resistant to weathering and erosion than the red shale beds. (170519-3)
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Incised Meanders, SE Utah (square)..
Incised Meanders of the Green River, SE Utah. (ID#:170703-20)
Download ImageChemical Weathering in Headstone (vertical)
Different effects of chemical weathering according to rock type: limestone in foreground; granite in left background. Vermont. (Image ID #WE-58)
Download ImageSoil Creep
Soil creep as indicated by curved tree trunks, eastern Nevada (Image ID# WE-59)
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Effects of flash flood
In 2004, a flash flood swept down Furnace Creek Wash in Death Valley National Park, tearing up the state highway and destroying the structures in and around the Zabriskie Point area. Such flash floods are relatively common, as most rainfall tends to run off into channels instead of soak into the ground. This particular flood was especially severe though because the rain fell in small area over a short amount of time.
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