Marbled Icebergs
Normally an iceberg appears White as a result of the tiny bubbles trapped within which scatter light in every direction. Blue stripes are created when a crevice in the ice sheet fills up with meltwater and freezes so quickly that no bubbles form. When an iceberg falls into the sea, a layer of salty seawater can freeze to the underside. If this is rich in algae, it can form a Green stripe. Brown lines are caused by sediment, picked up when the ice sheet grinds downhill towards the sea
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Another striped iceberg with a striking diagonal blue line through it, which towered about 30 meters above the ocean surface, was spotted a few days later
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