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Posts tagged “tunnel

Why the Glacial Ice is Blue?

One of the attractions of the glacier is the beautiful blue colour of its ice. In the upper reaches of the glacier the ice can be up to 300m thick. The upper layer is snow. When this reaches about 16 – 20m deep the snow compresses under its own weight and all the air is squeezed from between the snow crystals, forming glacial ice. (more…)