The mantle is a layer between the crust and the outer core. Earth's mantle is a silicate rocky shell with an average thickness of 2,886 kilometres (1,793 mi). The mantle makes up about 84% of Earth's volume. It is predominantly solid but in geological time it behaves as a very viscous fluid.
demolition - an event (or the result of an event) that completely destroys something wipeout, destruction conclusion, ending, finish - event whose occurrence ends something; his death marked the ending of an era; when these final episodes are broadcast it will be the finish of the show
Destroy, raze, and demolish can all imply reduction to ruins or even complete obliteration: I saw the best minds of my generation destroyed by madness (Allen Ginsberg).raze what was left of the city from the surface of the earth (John Lothrop Motley). The prosecutor demolished the opposition's argument.