First you go this way, wiggles around, in out in out and shake it all about, and then you go that way, do the …. which is a bit like the core of the Earth it seems. At http://archaeologynewsnetwork.blogspot.co.uk/2013/09/300-year-old-proble… … scientists at Leeds University claim the iron core super rotates (spins faster than the rest of the planet) in an eastwards direction. The outer core, they say, rotates more slowly in a westwards direction, and according to the research it does this as it is responding to the geomagnetic field. The paper was published by PNAS.
At http://archaeologynewsnetwork.blogspot.co.uk/2013/09/new-research-provid… .. is a post on the mantle and its relationship with the upper crust.