Glass ice is fairly uncommon. Sometimes, this kind of ice is called black
ice or congelation ice. The ice I am
talking about is crystal clear. This
year, a layer of glass ice formed on a few lakes in western Montana. This type of ice will form only during ideal
conditions of perfectly calm cold weather.
Glass ice often appears to be quite thin due to the
lack of air bubbles or other such inclusions to give some indication of
depth. Today, I am posting an
ice-skating video made on Vann Lake. The
ice is about five inches in depth. Five
inches of ice is generally considered thick enough to support an ATV or
snowmobile.
--Mitchell
Hegman
If
the video fails to play, please click on this link: http://www.youtube.com/watch?v=nXjTMvbcPHI
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