Fromage · 18/09/2024 06:10
Australia, however, is going nowhere.
It is, it's moving North at 7cm a year, the Australian Plate is the fastest moving tectonic plate, at 7cm a year.
Also, magnetic pole shift worriers, the Earth doesn't flip round, just the polarity of its magnetism. The poles precess constantly - think of a spinning top not quite vertical and how the handle moves around. It's been known for hundreds of years and with modern mariners maps, there is information about the declination of the magnetic poles, for accurate course corrections.
The flipping of the poles has helped to age the oceanic plates, because there are stripes of rock, with opposite polarities, a bit like a giant zebra crossing. As the magma is extruded from rifts and sets, magnetic minerals align North - South and are fixed that way.
Well, not so much nowadays, with GPS positioning and route planning.
Yes, I'm a geologist, I need to get out more...