Saturday, 5 March 2011

Ice Circles


Due to the surprising popularity of my post on the Northern Lights, I found another intriguing natural phenomenon I have never heard of before! You may know about crop circles, but who knew ice circles existed. 

An Ice Circle forms in slow moving water when a fast moving current on the outer bend of a river causes the disc to rotate and shear off the edges of the ice, forming a circle. These can be up to four metres in diameter!
Ice pans, unlike ice circles, form in the center of lakes instead of on the water's edge. What do you think? Cool huh!

Check out some of my favourite images of ice circles below:


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