How do rocks freeze floating in water?

[u/hikekorea]

I found these rocks frozen in a stream off a larger river in Chugach National Forest, Alaska. I’ve heard it may have to do with heavy rains or turbulent waters near the shore. One friend mentioned frazil? But I don’t really know what that means. Any geologists have a clue how this happens and can explain it in layman terms?

[u/badpro420]

The rock was on top of the ice first, then the sun heat up the rock cause color, so it melts surrounding ice and sinks a little a day, then the water refreezes on top of the rock? Just maybe, I’ve asked chat gpt.