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The movement of the rocks occurs when large, thin sheets of ice floating on an ephemeral winter pond break up in the sun.
So a small puddle forms in the shade, under the rock, which freezes and causes the rock to slide forward a little bit. Over time this scoots the rock across the ground and leaves a trail that looks like it was pushed but with no footprints nearby.
Very cool!
How is this creepy?
It was creepy when I was a kid, before they figured out what makes them move.
That’s fair. Didn’t think about that.
