On 02/22/2011 05:35 PM, m II wrote:
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On 11-02-22 09:12 AM, dave wrote:

I doubt there's a dynamo in the center of the earth. My theory is the
magnetism is generated by solar radiation interacting with our iron
nickel molten core. The sun has a magnetic field that we travel through
as well. I don't how the earth's magnetic poles could reverse if they
were being generated inside the earth by liquid metal spinning. How
could you reverse that without major surface trauma?

The sun, being made entirely of plasma and gas, is much more amenable to
such radical shifts, in my humble opinion.

In my even more humble and borderline worthless opinion, I agree. The
core turning in and around the sun's field is probably what does it.

They know the poles can change, though. There's lake sediment with
alternating layers of iron bearing silt deposited at the bottom.
hardened Magma shows different directions too.

http://www.viewzone.com/poleshift.html


I remember reading Immanuel Velikovsky when I was younger. He had some
pretty good ideas concerning pole shifts and astronomical happenings.
There was an explanation of why, in the Old testament, there are
references to the sun rising in the west.

Too bad this article is on a page of dubious quality. Velikovsky's books
make excellent reading, however. The library is sure to have them.

http://www.unmuseum.org/velikov.htm


I know the poles reverse on occasion. I think there's some concurrent
evidence of solar variability.