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
demolish verb [T] (DESTROY). B2 to âcompletely âdestroy a âbuilding, âespecially in âorder to use the âland for something âelse: A ânumber of âhouses were demolished so that the âsupermarket could be âbuilt. C2 to âprove that an âargument or âtheory is âwrong: He âcompletely demolished all her âarguments.More examples. The â building had to be demolished because of â subsidence. 2  One by one the â old â buildings in the â city have been demolished and â replaced with â modern â tower â blocks. 3  The â explosion â virtually demolished several â nearby â houses.