Richmond Times-Dispatch Weekend - - INSIGHT -

Over time, glacial ice is com­pressed, caus­ing it to be­come dense. The com­pres­sion forces out the small air pock­ets be­tween crys­tals. This re­sults in the ab­sorp­tion of red light, leav­ing a blue tint that is re­flected. When a glacier is white, it usu­ally means that there are still many small air bub­bles in the ice.

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