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If you know anything about iron, you would know that as it solidifies the molecules form into domains. These domains arrange themselves according to the magnetic field they are in as being formed. So as lava cooled 5 million years ago iron domains formed, and recorded in a sence the strength and direction of Earth's magnetic field.
So it is obvious the magnetic field is reversed when the domains are charged toward the South pole....
The whole theory about the magnetic field switching directions was concocted and is now supported by MANY PhD's in Physics and Geology...
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"The years go fast, but the days go so slow"
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