Glacier is made up of water.
A glacier -LRB- -LSB- pronˈɡleɪʃər -RSB- or -LSB- ˈɡlæsiə -RSB- -RRB- is a persistent body of dense ice that is constantly moving under its own weight ; it forms where the accumulation of snow exceeds its ablation -LRB- melting and sublimation -RRB- over many years , often centuries.
