Icebergs in the Antarctic area

I got these in my email and thought I'd share them, Its kinda cool.

Icebergs in the Antarctic area sometimes have stripes, formed by
layers of snow that react to different conditions.

Blue stripes are often 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, black and yellow lines are caused by sediment, picked up
when the ice sheet grinds downhill towards the sea.