Brief Introduction Brief Introduction A glacier is a large mass of mobile, permanent ice formed on land by consolidation and recrystallization of snow flackes.
Some glaciers are as small as football fields, while others can be over a hundred kilometers long.
The earth's is currently nearing the end of an interglacial, so another ice age is due in a few thousand years. This is all part of a normal cycle of climatic variation. Although glaciers change very slowly over long periods, they serve as important signals of possible global climatic change.