Less dense then water its self
Niformitarianism is the assumption that the same natural laws and processes<span> that operate in the universe now have always operated in the universe in the past and apply everywhere in the universe. It refers to invariance in the metaphysical principles underpinning </span>science<span>, .... </span>Modern geologists do<span> not apply uniformitarianism in the same way as Lyell.</span>
In geology subduction is the process whereby one tectonic plate is forced underneath another tectonic plate along a convergent boundary. Places where this type of plate interaction occurs are called subduction zones. Subduction zones have a high rate of volcanism, earthquakes, and mountain building.