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Originally Posted by Hamlet53
Yeah, if he is talking about reversal of the magnetic pole that has happened in the past and will probably happen again; and when it does happened it will be relatively rapid. This is just due to changes in the currents of molten magnetic fluid in the Earth's core.
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I believe what he was talking about was a idea that came out a few years back that at a certain period (could be the 800 mya one) most of the landmass was gathered together in a Pangaea-like super-continent at a "lopsided" spot on the globe, and that "suddenly" (on the order of a few million years) that super-continent slid into a more "balanced" equatorial location (dragging all the other plates along with it.) I haven't heard mention of it in years, and I don't remember how well-received the idea was.