All About Glaciers, Introduction :: National Snow and Ice Data Center

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** ALL ABOUT GLACIERS **

· Introduction
· The Life of a Glacier
· About Glaciers

· Facts about glaciers
· What is a glacier?
· How is one formed?
· Why do they move?
· What are glacier components?
· Where are they?
· What types are there?
· How do they affect land?
· Do glaciers affect people?
· Are they dangerous?
· Glaciers and climate change

· Photo Gallery

· Glacier types
· Glacier


Source: nsidc.org/cryosphere/glaciers/questions/formed.html


how are glaciers formed


Glacier - Wikipedia, the free encyclopedia

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** Glacier **

From Wikipedia, the free encyclopedia
Jump to: navigation, search
This article is about the geological formation. For other uses, see Glacier
(disambiguation).
The Baltoro Glacier in the Karakoram, Baltistan, Northern Pakistan. At 62
kilometres (39 mi) in length, it is one of the longest alpine glaciers on
earth.
Ice calving from the terminus of the Perito Moreno Glacier, in western
Patagonia, Argentina
The Aletsch Glacier, the largest glacier of the Alps, in Switzerland
The Quelccaya Ice Cap, is the largest glaciated area in the tropics, in
Peru

A *glacier* (UK /ˈɡlæsiə/ /*GLASS*-ee-ər/ or US
/ˈɡleɪʃər/ /*GLAY*-shər/) is a large persistent body of
ice that forms where the accumulation of snow exceeds its ablation (melting
and sublimation) over many years, often centuries. Glaciers slowly deform
and flow due to stresses induced by their weight, creating crevasses,
seracs, and other distinguishing features. They also abrade rock and debris
from their substrate to create landforms such as cirques and moraines.
Glaciers form only on land and are distinct from the much thinner sea ice
and lake ice that form on the surface of bodies of water.

On Earth, 99% of glacial ice is contained within vast ice sheets in the
polar regions, but glaciers may be found in mountain ranges of every
continent except Australia, and on a few high-latitude oceanic islands.
Between 35°N and 35°S, glaciers occur only in the Himalayas, Andes, a
few high mountains in East Africa, Mexico, New Guinea and on Zard Kuh in
Iran.^[1]

Glacial ice is the largest reservoir of freshwater on Earth, supporting one
third of the world's population.^[2] Many glaciers store water during one
season and release it later as meltwater, a water source that is especially
important for plants, animals and human uses


Source: en.wikipedia.org/wiki/Glacier

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