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What causes the streaks and colours in icebergs?

April 26, 2017causes Colours icebergs streaks

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What causes the streaks and colours in icebergs?

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As the glacier crept over land, meltwater filled the crevasses. This water later froze and created clear, bubble free ice, and the illusion of bluish streaks through the iceberg. Why blue? Because of the natural light scattering characteristics of pure ice. Occasionally, airborne dust and dirt land on the glacier surface forming a noticeably darkened brown or black layer within the ice.