Sinking Beleriand

[doug*platypus]

It was "bent" into a sphere after the Númenóreans invaded

There appears to be a bit of contention over this point, as you can read here. Let's not go down that bent road on this thread!

I think we need to separate the powers of the Valar from the actual physical events that occur within Arda.

But some of the physical events (see my previous post, and add to it the Hiding of Valinor) are so far out of the realms of normal occurrence that there appears to be no plausible scientific explanation for them. I think the search for such explanations will be fruitless.