Here's a quick clip of the tide running out in Turnagain Arm Alaska; it's filled with ice chunks. This is early December and it hasn't been cold for very long, yet. The ice pieces are too small to call icebergs but it's still a great show of mother nature's power.
In our limited experience, sea ice starts to form at about 20 degrees and, at first, it isn't very thick. The tide then comes in, lifts up the ice, and then when the tide goes out so does the ice. The returning ice returns many of the ice chunks and with each tide, the ice gets thicker.
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