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Q&A What is an ice circle, and how does it form?

I've seen ice do a lot of strange things, but I've never seen it do this before: Ice Circle spinning on Middle Fork Snoqualmie River (Vimeo). What causes ice circles to form?

1 answer  ·  posted 8y ago by ShemSeger‭  ·  last activity 8y ago by System‭

Question ice rivers