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  • Geomorphology professor Robert Anderson (University of Colorado) discusses the geology of Factory Butte (visible in the background) to his students on a field trip to Utah.
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  • Students on a geology field trip from the University of Colorado stand on the rim of North Caineville Mesa, Utah.
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  • Students on a geology field trip from the University of Colorado, Ben Hudson and Jessica Stanley, look over the rim of North Caineville Mesa, Utah.
    110404_0725_pan.JPG
  • Students on a geology field trip with the University of Colorado gather on the rim of North Caineville Mesa, Utah.
    110404_0578_pan.JPG
  • Students from the University of Colorado stand on boulders and hoodoos on a geology field trip to Goblin Valley State Park, Utah.
    110402_9691_pan.JPG
  • Students from the University of Colorado stand on boulders and hoodoos on a geology field trip to Goblin Valley State Park, Utah.
    110402_9722.JPG
  • Students on a geology field trip with the University of Colorado stand in a large stone amphitheater in Little Wild Horse Canyon, San Rafael Swell, Utah.
    110403_0119_pan.JPG
  • Students on a geology field trip with the University of Colorado squeeze up the narrow Little Wild Horse Canyon, San Rafael Swell, Utah.
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  • Students, on a geology field trip with the University of Colorado, descend the steep trail that provides access to the rim of North Caineville Mesa, Utah.
    110404_0827.JPG
  • Students, on a geology field trip with the University of Colorado, descend the steep trail that provides access to the rim of North Caineville Mesa, Utah.
    110404_0826.JPG
  • Ben Hudson and Francis Rengers, students on a geology field trip with the University of Colorado, hike along a ridge at the foot of North Caineville Mesa, Utah.
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  • Students, on a geology field trip with the University of Colorado, walk along a ridge at the foot of North Caineville Mesa, Utah.
    110404_0875.JPG
  • Students, on a geology field trip with the University of Colorado, descend the steep trail that provides access to the rim of North Caineville Mesa, Utah.
    110404_0866.JPG
  • Leif Anderson, on a geology field trip with the University of Colorado, takes pictures standing the rim of North Caineville Mesa, Utah.
    110404_0798.JPG
  • Students on a geology field trip with the University of Colorado squeeze up the narrow Little Wild Horse Canyon, San Rafael Swell, Utah.
    110403_0080.JPG
  • Andy Wickert, on a geology field trip with the University of Colorado, takes pictures among hoodoos in Goblin Valley State Park, Utah.
    110402_9513.JPG
  • Katy Barnhart and Leif Anderson, students on a geology field trip with the University of Colorado, play with sand in Southern Utah.
    110402_9432.JPG
  • A man, with his head hidden, reaches his arms out of a hole as he climbs out of the giant Indian Tunnel  lava tube in Craters of the Moon National Monument, Idaho.
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  • Liana Welty stands arms raised amid a pile of rock rubble below the opening to the giant Indian Tunnel lava tube in Craters of the Moon National Monument, Idaho. Indian Tunnel is nearly 30 feet high, 50 feet wide and 800 feet long, and was formed by the lava flow forming an upper crust, insulating the molten lava within.
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  • Cracks and air bubbles form complex structures in glacier ice exposed on the surface of Rabotbreen, Svalbard.
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  • UNIS professor Doug Benn (left) and his students cross a frozen meltwater pool on Tellbreen, Svalbard.
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  • Grooves on the underside of an iceberg calved by Hansbreen, formed by sliding of the glacier on its bed, in Hornsund, Svalbard.
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  • Eroded sandstone patterns, like melted wax, on the cliff walls of Burrah Canyon, Wadi Rum, Jordan.
    120218_9589.JPG
  • A (tourist) Bedouin camp set amongst intricately eroded sandstone formations in Wadi Rum, Jordan.
    120217_9233_pan_crop.JPG
  • Detail of pockets eroded into the rock by flash floods in Al Siq, the slot canyon entrance to Petra, Jordan.
    120216_8173.JPG
  • Honeycomb pattern salt weathering in a rock wall along the North Coast, Olympic National Park, Washington.
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  • A young woman looks out from the rim of North Caineville Mesa towards Factory Butte, Utah.
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  • Geomorphology professor Robert Anderson lectures his students on a field trip with the University of Colorado standing on the Fremont River terraces near Hanksville in Southern Utah.
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  • Geomorphology professor Robert Anderson points out features on the canyon walls to his students from the University of Colorado in Little Wild Horse Canyon, San Rafael Swell, Utah.
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  • A vast field of hoodoos and high mesas at Goblin Valley State Park, Utah.
    110402_9635.JPG
  • View of the Dillon Pinnacles above the frozen surface of the Blue Mesa Reservoir in Curecanti National Recreation Area, Colorado.
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  • An undercut roof of glacier ice over freshly fallen snow on Rabotbreen, Svalbard.
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  • Snow dusts melt cups on exposed glacier ice on Rabotbreen, Svalbard. Cracks and air bubbles form complex structures inside the ice.
    140226_1167.JPG
  • Cracks and air bubbles form complex structures in glacier ice exposed on the surface of Rabotbreen, Svalbard.
    140226_1148.JPG
  • Glacier ice and embedded sediment exposed on the surface of Rabotbreen, Svalbard.
    140226_1073.JPG
  • Stephen Jennings installs a fixed top rope on a meltwater head cut in an ice cave in Larsbreen, Svalbard.
    140222_0782.JPG
  • Kiya Riverman logs survey readings on her expedition to map an ice cave in Larsbreen, Svalbard.
    140222_0626.JPG
  • Nate Stevens takes a reading with a compass and clinometer on an expedition to map an ice cave in Larsbreen, Svalbard.
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  • Meltwater stream head cut in an ice cave in Larsbreen, Svalbard.
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  • UNIS professor Doug Benn points out sediment-filled cracks in the exposed glacier ice on Tellbreen, Svalbard.
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  • UNIS professor Doug Benn (yellow) and his students approach exposed glacier ice on Tellbreen, Svalbard.
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  • UNIS professor Doug Benn lectures Mylène Jacquemart and other students about glaciers from the foot of Tellbreen, Svalbard.
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  • UNIS professor Doug Benn lectures his students about glaciers from the foot of Tellbreen, Svalbard.
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  • Delicate stalactites and complex strata inside an ice cave in Scott Turnerbreen, Svalbard.
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  • Glacial erratic near Chasm Lake, Rocky Mountain National Park, Colorado.
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  • River delta and sediment plumes in College Fjord, Prince William Sound, Alaska.
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  • Intertidal mudflats with drainage network outside Anchorage, Alaska.
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  • Fractured rock in Hornsund, Svalbard.
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  • Fractured rock on the coast in Hornsund, Svalbard.
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  • Hikers traverse a wave eroded bedrock bench in the continental shelf near Owen Point, West Coast Trail, British Columbia, Canada.
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  • Natural potholes eroded by wave action and gravel near Owen Point, West Coast Trail, British Columbia, Canada.
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  • Boulders on the striated bedrock surface of the continental shelf near Bonilla Point, West Coast Trail, British Columbia, Canada.
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  • Henry drops his head into a bedrock pothole to cool off along the West Coast Trail, British Columbia, Canada.
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  • Large boulders fill a narrow sandstone canyon in Wadi Rum, Jordan.
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  • Boulders balance on eroded pedestals in a narrow sandstone canyon in Wadi Rum, Jordan.
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  • Shrubs grow below eroded sandstone patterns, like melted wax, on the cliff walls of Burrah Canyon, Wadi Rum, Jordan.
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  • Eroded sandstone formation in Wadi Rum, Jordan.
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  • Unusual sandstone boulders in Wadi Rum, Jordan.
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  • A (tourist) Bedouin camp set amongst intricately eroded sandstone formations in Wadi Rum, Jordan.
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  • A (tourist) Bedouin camp set amongst intricately eroded sandstone formations in Wadi Rum, Jordan.
    120217_9233_pan2.JPG
  • A (tourist) Bedouin camp set amongst intricately eroded sandstone formations in Wadi Rum, Jordan.
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  • Intricately eroded sandstone formations in Wadi Rum, Jordan.
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  • Two donkeys walk inside a canyon with intricate patterns in Petra, Jordan.
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  • Detail of colorful rock patterns in the cliffs of Petra, Jordan.
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  • University of Colorado geomorphology professor Robert Anderson walks with a student through the mancos shale badlands near Factory Butte, Utah.
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  • Aerial view of Basin and Range Province topography, alternating mountains and valleys, in Nevada.
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  • Leif Anderson stands at twilight below the central buttress of Wild Horse Window, San Rafael Swell, Utah.
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  • Detail of cavities eroded into the sandstone walls of Little Wild Horse Canyon, San Rafael Swell, Utah.
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  • A vast field of hoodoos and high mesas at Goblin Valley State Park, Utah.
    110402_9638_pan_crop.JPG
  • A vast field of hoodoos at Goblin Valley State Park, Utah.
    110402_9571.JPG
  • Ethan Welty, with his head hidden, reaches his arms out of a hole as he climbs out of the giant Indian Tunnel  lava tube in Craters of the Moon National Monument, Idaho.
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  • Unusual sandstone formations caused by wind erosion along the Pacific coast near the village of Mazunte, Oaxaca, Mexico on July 7, 2008.
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  • Fractured, brittle glacier ice on Rabotbreen, Svalbard.
    140226_1328.JPG
  • A veneer of glacier ice covers encased sediment on the surface of Rabotbreen, Svalbard.
    140226_1248.JPG
  • Snow fills melt cups on exposed glacier ice on Rabotbreen, Svalbard.
    140226_1109.JPG
  • Kiya Riverman looks down a meltwater stream head cut in an ice cave in Larsbreen, Svalbard. Riverman, a glaciology graduate student, was repeat mapping the head cuts to measure their rates of erosion.
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  • Meltwater stream head cut in an ice cave in Larsbreen, Svalbard.
    140222_0826.JPG
  • Stephen Jennings throws down a fixed top rope on a meltwater head cut in an ice cave in Larsbreen, Svalbard.
    140222_0800.JPG
  • Stephen Jennings looks down a meltwater head cut in an ice cave in Larsbreen, Svalbard.
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  • Meltwater stream head cut in an ice cave in Larsbreen, Svalbard.
    140222_0785.JPG
  • Stephen Jennings installs a fixed top rope on a meltwater head cut in an ice cave in Larsbreen, Svalbard.
    140222_0781.JPG
  • Stephen Jennings explores the narrow passages of an ice cave in Larsbreen, Svalbard.
    140222_0729.JPG
  • Embedded sediment, rocks, and air bubbles form complex layers in walls of an ice cave in Larsbreen, Svalbard.
    140222_0667.JPG
  • Nate Stevens takes a reading with a compass and clinometer on an expedition to map an ice cave in Larsbreen, Svalbard.
    140222_0528.JPG
  • Heïdi Sevestre (left) helps UNIS students interpret the results of a practice snowmobile depth-sounding radar survey on Tellbreen, Svalbard.
    140220_0354.JPG
  • Deformed sediment-filled crack in glacier ice exposed on Tellbreen, Svalbard.
    140220_0351.JPG
  • UNIS student Mylène Jacquemart under a large ice arch on a class field trip to Tellbreen, Svalbard.
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  • UNIS students Robin de Vries (left) and Nate Stevens explore an ice cave in Tellbreen, Svalbard on a class field trip.
    140220_0253.JPG
  • UNIS professor Doug Benn (center) lectures his students inside an ice in Scott Turnerbreen, Svalbard.
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  • Inside the entrance to an ice cave in Scott Turnerbreen, Svalbard.
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  • Glacial erratic near Chasm Lake, Rocky Mountain National Park, Colorado.
    120316_9664.JPG
  • Unusual granite rock formations along the Goose Creek Trail, Lost Creek Wilderness, Colorado.
    120520_3241.JPG
  • Fractured rock erodes in jagged blocks on the coast in Hornsund, Svalbard.
    110825_1716.JPG
  • Hikers traverse a wave eroded bedrock bench in the continental shelf near Owen Point, West Coast Trail, British Columbia, Canada.
    110804_9392.JPG
  • Strange boulders on continental shelf bedrock, West Coast Trail, British Columbia, Canada.
    110803_9106.JPG
  • Zach Podell-Eberhardt navigates the partially submerged, striated surface of the continental shelf near Bonilla Point, West Coast Trail, British Columbia, Canada.
    110803_9021.JPG
  • A narrow sandstone canyon in Wadi Rum, Jordan.
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  • A boulder at the angle of repose in a small sandstone canyon in Wadi Rum, Jordan.
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  • Colored sandstone boulders at sunset in Wadi Rum, Jordan.
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  • Eroded sandstone pockets in Wadi Rum, Jordan.
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