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Images of the Erosional Features of Alpine Glaciation
Images of Horns, Aretes and Cirques
Alpine glaciers erode by plucking rocks from the base of slopes in the hollows where they originate. The valleys become cliff-lined bowl shaped valleys called cirques. When two cirques or two glacial valleys merge, a sawtoothed ridge called an arete is formed. If glacial valleys eat away at a mountain peak from three or more directions, a sharp pointed peak will emerge. These are called horns.
Pilot Peak near Yellowstone National Park Pilot Peak near Yellowstone National Park Grand Tetons glacial horns Horn in Lamoille Canyon in Ruby Range, Nevada Horn in Banff National Park Horn in Banff National Park
Pilot Peak, a horn near Yellowstone National Park Pilot Peak, a horn near Yellowstone National Park Grand Tetons, glacial horns in Grand Tetons National Park in Wyoming Horn in Lamoille Canyon in Ruby Range, Nevada Horn in Banff National Park Horn in Banff National Park in Alberta, Canada
Horn in Banff National Park Horn in Yoho National Park Horns and Cirques in Yoho National Park, British Columbia Emerald Glacier and cirque, Yoho National Park, British Columbia glacier filled cirque in Greenland Horn and Cirque at Lake MacDonald in Glacier National Park
Horn in Banff National Park, Alberta, Canada A horn (Wapta Pk?) in Yoho National Park, British Columbia Horns and cirques in Yoho National Park, British Columbia Emerald Glacier in a cirque,Yoho National Park, British Columbia Glacier filling a cirque in Greenland Horn and Cirque at Lake MacDonald in Glacier National Park
Horn and cirque at St. Mary Lake Hanging Valley and Truncated Spurs at " Hanging Valleys, Truncated Spurs, and Moraine Lake Horn and Arete at Glacier National Park Clements Mountain at Glacier National Park Clements Mountain, a horn at Glacier National Park
Horn and cirque at Saint Mary Lake, Glacier National Park Truncated spurs and hanging valley at Saint Mary Lake, Glacier National Park Truncated spurs and hanging valley at Saint Mary Lake, Glacier National Park Horn and arete at Glacier National Park Clements Mountain, a horn at Glacier National Park Clements Mountain, a horn at Glacier National Park
Cirques along Beartooth Highway in Montana  Cirque and horn on Beartooth Highway, Montana        
 Cirques along Beartooth Highway in Montana  Cirque and horn on Beartooth Highway, Montana        
           
           
           
           
           
           
Images of Tarns, Hanging Valleys and U-Shaped Valleys
Alpine glaciers modify the shape of river-carved valleys into U-shaped valleys. Tributary glaciers cannot carve as deeply as trunk glaciers, so when the ice recedes, the tributary valley floors enter the main valleys at high elevations, with waterfalls and cascades. These are called hanging valleys. Tarns are glacial lakes that have been gouged out of bedrock.
Bird Woman Falls, a hanging valley in Glacier National Park Takakkaw Falls, a hanging valley in Yolo National Park Takakkaw Falls, a hanging valley in Yoho National Park No-see-um Falls and hanging valley Emerald Glacier and hanging valley in Yoho National Park, British Columbia U shaped valley at Petoe Lake, Banff National Park
Bird Woman Falls in a hanging valley, Glacier National Park Takakkaw Falls, a hanging valley in Yoho National Park, British Columbia Takakkaw Falls, a hanging valley in Yoho National Park in British Columbia. It is the tallest waterfall in Canada No-see-um Falls, a hanging valley in Yoho National Park, British Columbia Emerald Glacier and hanging valley in Yoho National Park, British Columbia U-shaped valley and Petoe Lake in Banff National Park, Alberta Canada
Glacial canyon, Going to the Sun Highway in Glacier National Park Glacial horn in Glacier National Park Hanging valley above Grinnell Lake in Glacier National Park U shaped Valley on the Beartooth Highway  U-shaped valley, Kings Canyon National Park U-shaped valley, Kings Canyon National Park
Glacial canyon, Going to the Sun Highway in Glacier National Park Horn in Glacier National Park Hanging valley and Grinnell Lake in Glacier National Park U shaped Valley on the Beartooth Highway  U-shaped valley, Kings Canyon National Park U-shaped valley, Kings Canyon National Park
U shaped valley near Sonora Pass          
 U shaped valley near Sonora Pass, Sierra Nevada, CA          
           
           
           
           
           
           
Images of Glacial Polish, Striations and Grooves
           
           
Glacial striations near Athabasca glacier in Banff Glacial striations near Athabasca Glacier Glacial striations near Athabasca Glacier in Alberta, Canada Striated boulder near Athabasca Glacier in Alberta, Canada Glacial milk in Yoho River, Yoho National Park Glacial polish on Devils Postpile
Glacial striations near Athabasca Glacier in Alberta, Canada Glacial striations near Athabasca Glacier in Alberta, Canada Glacial striations and polished rock near Athabasca Glacier in Alberta, Canada Striated boulder near Athabasca Glacier in Alberta, Canada Glacial milk, very fine suspended sediment carried by rivers downstream of glaciers, Yoho River. Glacial polish on Devils Postpile
Glacial striations at Devils Postpile, CA Glacial polish on basalt at Devils Postpile Glacial polish on basalt at Devils Postpile      
Glacial striations at Devils Postpile, CA Glacial striations basalt at Devils Postpile Glacial polish on basalt at Devils Postpile      
           
           
Images of Active Glaciers
Saskatchawan Glacier in Banff National Park Saskatchawan Glacier in Banff National Park Saskatchewan Glacier in Banff National Park       Saskatchewan Glacier in Banff National Park Toe of Athabasca Glacier in Alberta, Canada Toe of Athabasca Glacier
Saskatchewan Glacier in Banff National Park Saskatchewan Glacier in Banff National Park Saskatchewan Glacier in Banff National Park Saskatchewan Glacier in Banff National Park Toe of Athabasca Glacier in Alberta, Canada Toe of Athabasca Glacier in Alberta, Canada. Note people for scale
Toe of Athabasca Glacier in Alberta, Canada Toe of Athabasca Glacier in Alberta, Canada Toe of Athabasca Glacier in Alberta, Canada Toe of Athabasca Glacier in Alberta, Canada Athabasca Glacier in 2005 Athabasca Glacier in Alberta, Canada
Toe of Athabasca Glacier in Alberta, Canada. Note people for scale Toe of Athabasca Glacier in Alberta, Canada Toe of Athabasca Glacier in Alberta, Canada Toe of Athabasca Glacier in Alberta, Canada. Note people for scale  Athabasca Glacier in Alberta, Canada  Athabasca Glacier in Alberta, Canada
Emerald Glacier and cirque in Yoho National Park Crowfoot Glacier in Banff National Park Bow Glacier in Banff National Park Glaciers with lateral and medial moraines, Greenland Merging glaciers with moraines and zone of ablation Calving glacier in Greenland
Emerald Glacier  and cirque, Yoho National Park, British Columbia Crowfoot Glacier in Banff National Park, Alberta, Canada Bow Glacier in Banff National Park, Alberta, Canada Merging glaciers in Greenland, with lateral and medial moraines Merging glaciers in Greenland, with lateral and medial moraines Calving glacier in Greenland, during a London-US flight
Jackson Glacier in Glacier National Park Palisades Glaciers in the central Sierra Nevada Palisades Glaciers in the central Sierra Nevada      
Jackson Glacier in Glacier National Park Palisades Glaciers in the central Sierra Nevada Palisades Glaciers in the central Sierra Nevada      

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