this post was submitted on 27 Apr 2024
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[โ€“] disheveledWallaby@lemmy.ml 16 points 6 months ago (1 children)

Likely glaciation, the bottom rock was likely on the bottom of an ice sheet and millions of tons of ice moving over it over time had smoothed it out.

The top rock is probably from many miles away and was carried and placed there from the receding glacier. To me the top rock looks like it is a completely different type of stone then the bottom.

[โ€“] SeveralAnts@lemmy.world 1 points 6 months ago

Awesome. That would make sense.