This isn't a man made ice carving, but a natural occurrence. Although much of earth art is seen to be creations by man that incorporates the earth, it is nice to see art forming around the world naturally. The exact mechanism for forming an ice circle isn't known because they have formed river bends where the river flow changes direction and in still ponds. The circle of ice actually spins probably because of the water flow beneath, and as the spinning ice collides with the standing ice a perfect circle is naturally formed.
I glad you entered this post because although we have seen artist that make Earth Art, it's pleasurable seeing our Earth working at it's best.
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