Quote:
Originally Posted by Xist
In unrelated news, this was just the most convenient thread, here is a video from Existential Dread with Joe:
I do not have any idea what any of it means. I have strep and cannot sleep, but it had pretty colors. |
Earth's like a crunchy treat, with a liquid center around it's solid core. The liquid contains ferrous material, and conductive plumes act like faraday coils, producing an electromagnet and field.
Melting ice caps are enough to throw the planet's rotation out of sync, and the wobbling effect can alter the liquid convective ( lava lamp ) plumes below the lithosphere ( crust ).
When lava cools, it 'marks' magnetic alignment at the instant of solidification, and geologists can 'read' the direction of the poles, when a host of dynamic factors are all figured into the mix.
Sometimes there are complete reversals, sometimes just hiccups. It will do that for at least 5-billion more years.