Well this thread went in a direction I didn't expect. I'm not a #geomagnetism or indeed #geodesy specialist and the mechanism for #PolarWander proposed sounds implausible but not impossible.

Would be interested to hear what those who know more about this think though...

My suspicion would be that #deglaciation now is rather too small compared to vast changes in past but what do you think @pa1ejo ?

https://universeodon.com/@bps_artish/109590310604353371