Water pressure below the glacier and stress from the massive weight above probably produces the cracks in the glaciers which can lead to global warming. The scientists go out there and drill holes on the glaciers to see how much it would drain. Some of the glaciers which are about 80 meters deep allows glacier to absorb, sponge-style, a sudden inrush of water from melting or rain. Another reason why glaciers are cracked is because of the hot air from global warming. More and more of the glaciers are being melted or cracked because of this. There are many glaciers cracked and this one is just 1 of 1 million.
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