It is thought that ice circles are formed when surface ice gathers in the center of a body of water rather than the edges. A slow moving river current can create a slow turning eddy, which rotates, forming an ice disc. Very slowly the edges are ground down until a gap is formed between the eddy and the surrounding ice. (via Massive 10ft Spinning Ice Circle Discovered in the UK )

It is thought that ice circles are formed when surface ice gathers in the center of a body of water rather than the edges. A slow moving river current can create a slow turning eddy, which rotates, forming an ice disc. Very slowly the edges are ground down until a gap is formed between the eddy and the surrounding ice. (via Massive 10ft Spinning Ice Circle Discovered in the UK

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Tags: disque glace lac forteana cercle rotation phénomène