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1 Overview  





2 Examples  





3 See also  





4 Further reading  





5 References  





6 External links  














Glacier cave






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From Wikipedia, the free encyclopedia
 


A partly submerged glacier cave on Perito Moreno Glacier. The ice facade is approximately 60 m high
Ice formations in the Titlis glacier cave

Aglacier cave is a cave formed within the ice of a glacier. Glacier caves are often called ice caves, but the latter term is properly used to describe bedrock caves that contain year-round ice.[1]

Overview[edit]

This glacier cave has been excavated by a hot spring underneath a snow field in south central Iceland, a country where such formations are common due to the high geothermal and volcanic activity, plus the high latitude, cold weather, and frequent snowfall.

Most glacier caves are started by water running through or under the glacier. This water often originates on the glacier's surface through melting, entering the ice at a moulin and exiting at the glacier's snout at base level. Heat transfer from the water can cause sufficient melting to create an air-filled cavity, sometimes aided by solifluction. Air movement can then assist enlargement through melting in summer and sublimation in winter.

Some glacier caves are formed by geothermal heat from volcanic vents or hotsprings beneath the ice. An extreme example is the Kverkfjöll glacier cave in the Vatnajökull glacier in Iceland, measured in the 1980s at 2.8 kilometres (1.7 mi) long with a vertical range of 525 metres (1,722 ft).

Some glacier caves are relatively unstable due to melting and glacial motion, and are subject to localized or complete collapse, as well as elimination by glacial retreat. An example of the dynamic nature of glacier caves is the former Paradise Ice Caves, located on Mount Rainier in the United States. Known since the early 1900s, the caves were thought to have disappeared altogether in the mid-1940s, yet in 1978 cavers measured 13.25 kilometres (8.23 mi) of passageways in glacier caves there, and it was then considered the longest glacier cave system in the world. The Paradise Ice Caves collapsed and vanished in the 1990s, and the lower lobe of the glacier which once contained the caves has also vanished entirely between 2004 and 2006.

Glacier caves may be used by glaciologists to gain access to the interior of glaciers. The study of glacier caves themselves is sometimes called "glaciospeleology".

Examples[edit]

See also[edit]

Further reading[edit]

References[edit]

  1. ^ Nanna Gunnarsdóttir (n.d.). "Caves in Iceland". Guide to Island, a collaboration of more than 300 travel companies and individuals. Retrieved 20 January 2015.
  • ^ Zimbelman, D. R.; Rye, R. O.; Landis, G. P. (2000). "Fumaroles in ice caves on the summit of Mount Rainier; preliminary stable isotope, gas, and geochemical studies". Journal of Volcanology and Geothermal Research. 97 (1–4): 457–473. Bibcode:2000JVGR...97..457Z. doi:10.1016/S0377-0273(99)00180-8.
  • External links[edit]

    Media related to Glacier cave at Wikimedia Commons


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