[Pearls Before Swine]

Let’s hope they circulate, as in a lava lamp, rather than burble to the surface!

[gr8eman]

Exactly...as they rise and cool they become more dense, then fall.

[treetopsandroofs]

“Let’s hope they circulate, as in a lava lamp, rather than burble to the surface!”

I wonder how large a near earth object would have to be in order to effect your scenario, and whether the moon’s gravity already influences them to some degree.