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4908 images found

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Fault gouge along detachment fault, Nevada

Fault gouge along low-angle normal fault in limestone. Note the asymmetric cataclastic foliation (“P” foliation) 8UW93-134

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Fault gouge along detachment fault

Fault gouge along low-angle normal fault, Death Valley, California. Note the mesoscopically ductile features in this cataclasized rock! (MG_2928)

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Landslide hummocks, Mt. St. Helens, Washington

Hikers and landslide hummocks in the crater of Mt. St. Helens, Washington (220813-45)

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Phantom Ship, Crater Lake caldera, Oregon (vertical)

Phantom Ship, 400ka andesite in the caldera of Mt. Mazama. Crater Lake National Park, Oregon. (221016-30)

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Fjaðrárgljúfur Canyon, Iceland

Fjaðrá River and Fjaðrárgljúfur Canyon, Iceland, eroded into palagonite tuff (180907-18)

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Fjaðrárgljúfur Canyon, Iceland (vertical)

Fjaðrá River and Fjaðrárgljúfur Canyon, Iceland, eroded into palagonite tuff (180907-16)

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Ash bed in Oligocene-Miocene rock, Nebraska

Ash bed in Oligocene-Miocene rock of the Arikaree Group, Scotts Bluff National Monument, Nebraska (220916-106) volcanic air fall, Tertiary

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Ash bed in Oligocene-Miocene rock, Nebraska

Volcanic ash bed in Oligocene-Miocene sandstone of the Arikaree Group, Scotts Bluff National Monument, Nebraska. (220916-76)

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Concretions and cross-bedded sandstone, Nebraska

Irregularly shaped concretions and cross-bedded sandstone of the Oligocene-Miocene Arikaree Group, Scotts Bluff, Nebraska (220916-33)

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Foliation in Ordovician gneiss, Delaware

Foliation in Ordovician Brandywine Blue Gneiss of the Wilmington Complex, Delaware (220909-9)

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Boudin of quartz-feldspar gneiss in granofels

Boudin of granitic gneiss in older Silurian-Devonian granofels, New Hampshire (220905-4)

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Seneca Rocks, West Virginia

Seneca Rocks, made of Silurian Tuscarora Sandstone, West Virginia (210908-11)

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Cliffs of White River and overlying Arikaree Groups, NE

Cliffs of flat-lying Oligocene White River Group below Oligocene-Miocene Arikaree Group of Scotts Bluff National Monument, Nebraska (220916-118)

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Edge of Ash bed in Oligocene-Miocene sandstone, Nebraska

Edge of Ash bed in Oligocene-Miocene sandstone of the Arikaree Group, Scotts Bluff National Monument, Nebraska 220916-112)

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Scotts Bluff and Great Plains, Nebraska

Flat-lying rocks of the Oligocene White River Group and overlying Oligocene-Miocene Arikaree Group form bluffs overlooking the Great Plains, Scotts Bluff National Monument, Nebraska (220916-110)

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