Actually… some rocks would float on lava. Your average lava is about three times more dense than water. Your average person is only slightly denser than water (due to all our watery goodness), and so a person would float on lava (contrary to what movies show you). A lot of sedimentary rocks (sandstone, shale), limestones, (flynt) coal, pumice, and even granite are all less dense than lava… so they would presumably float on lava. And then you have the tectonic plates… which are essentially giant pieces of granitic rock ‘floating’ on magma (lava while still underground).
So yes, Gavin, some rocks does float on lava. Probably.
FF Villain Valentines. My gift to you.
My Little Villains - Limit Break
Featuring Trance Kuja, Safer Sephiroth, and ‘I’m gonna blow up EVERYTHING’ Kefka.