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Glacier is the name given to extremely large and longstanding sheets of ice. Many of the highest mountains and mountain ranges have alpine glaciers, at high altitudes. The Earth's Polar regions retain large glacial ice sheets, left over from the Earth's last ice age.

The melting of glaciers is described as one of the key signs of global warming.[1][2][3]

Large ice sheets, left over from the last ice age, continue to cover Antarctica, Greenland, Iceland and South Georgia. Inhabitants of some arid regions rely on fossil water, either in the form of glacial meltwater, or deep acquifers last recharged by the last ice age.


  1. "Glaciers melting fastest in South America". Sydney Morning Herald. 2010-12-08. Retrieved 2012-07-15. "Most glaciers - which are formed by accumulations of snow and ice - started shrinking around 150 years ago, but the rate of ice loss has increased significantly since the 1980s, the report said."  mirror
  2. Jason Lange (2007-08-09). "Glaciers wasting away on Mexico's peaks". Reuters. Archived from the original on 2012-07-15. Retrieved 2012-07-15. ""We estimate the glaciers could last another 20 or 30 years," Hugo Delgado, a glaciologist at Mexico City's UNAM university, said this week." 
  3. David Adam (2006-10-12). "Glaciers in terminal decline". The Hindu. Archived from the original on 2012-07-15. "Georg Kaser, a glaciologist at the University of Innsbruck, Austria, who led the research, said: "The glaciers are going to melt and melt until they are all gone. There are not any glaciers getting bigger any more.""