what causes blue ice in the lake
Walter White's discards, commented one Facebook user, comparing the turquoise ice to the blue meth Walter White cooks up in Breaking Bad. Unlike Walter White's creations, the blue ice on Lake Michigan has much less illicit origins. The bizarre coloring has to do with the ice's density. Ice only appears blue when it is sufficiently consolidated that bubbles do not interfere with the passage of light, explains this Carleton University guide to glaciers.