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This large boulder, a glacial erratic, perches on a gneiss platform in New York City's Central Park. ... The rock has a different composition from the ground it sits on and clearly comes from elsewhere. Boulders like this are called erratics. Below is another erratic from Alaska. ... Rock Glacier...
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geology.about.com/library/bl/images/blerratic.htm
geology.about.com/library/bl/images/blerratic.htm
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images, top to bottom. left to right: > Perched erratic boulder, North West Territories, Canada; Erratic boulder, Manitoba, Canada; > Erratic boulder, Tree River, Nunavut, Canada; Perched erratic boulder, Newfoundland, Canad ... GLIMS Glacier Database...
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nsidc.org/glaciers/gallery/erratics.html
nsidc.org/glaciers/gallery/erratics.html
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Definition: An erratic is a boulder transported and deposited by a glacier having a lithology different than the bedrock upon which it is sitting. Erratics are useful indicators of patterns of former ice flow.
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www.fettes.com/Cairngorms/glacial%20erratics.htm
www.fettes.com/Cairngorms/glacial%20erratics.htm
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BOOKS...
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www.glaciererratica.com/
www.glaciererratica.com/
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The brown cloud of particulate air pollutants that now cover all of Asia and the seas around is responsible for the weak and erratic monsoon in India, about half of the global warming and a major rise in respiratory ailments like tuberculosis. ... From a receding glacier, an SOS to the world - 22 Sep 2009...
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www.indiaenews.com/technology/20070812/65110.htm
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The brown cloud of particulate air pollutants that now cover all of Asia and the seas around is responsible for the weak and erratic monsoon in India, about half of Ramanathan said NASA satellites had found major glacier retreat on both sides of the Himalayas. This means major Asian rivers such as the Ganges, the Indus,
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www.news.boloji.com/2007-2/200708/10207.htm
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Boulder on a glacier below the Dix hut in Switzerland ... Glacier erratic by sliabh. ... Click this icon to see all public photos and videos tagged with glacier...
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www.flickr.com/photos/18558660@N00/85757399/
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The clouds and the seasons come and go, but these boulders on a glacier polished slab on Steens Mountain haven't moved a millimeter in the 15,000 years or so since they were dropped here by a retreating glacier at the close of the last glacial period.
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www.djensenphotography.com/images/ne_ore/mountains/stee...
www.djensenphotography.com/images/ne_ore/mountains/steens_polish.htm
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A glacier is a perennial mass of ice which moves over land. A glacier forms in locations where the mass accumulation of snow and ice exceeds ablation over many years... ... . Geologists identify erratics by studying the rocks surrounding the position of the erratic and the composition of the erratic itself.
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www.absoluteastronomy.com/topics/Glacial_erratic
www.absoluteastronomy.com/topics/Glacial_erratic
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