<< I seem to remember reading an article that stated that the very centre of
the core was a massive crystal(I think of iron) How was this determined?
Well, don't quote me on this, but I think either someone shot some time of
EM radiation through the earth and measured it's distortion on the other
side (of course, the radiation would be altered differently depending on
how it entered the grain of the crystal) Hmm... that doesn't sound like a
very likely scenario now that I think about it. How about this: when an
earthquake occurs on the other side of the planet, you measure how long it
takes to go through the diameter of the earth. The time it takes should
be influenced by the direction the shock wave passes through the crystal.
Apparently, the arrangement of the domains of this large iron crystal
explain the earth's large magnet field. Also, one could explain pole
shift(not the kind Danny was talking about!) by the inversion of this iron
crystal, which might be induced by some external magnetic field... a large
metallic asteroid? Sorry I'm being so vague... has anyone else read the
article to which I am poorly alluding?
Geoff.
>>
Hi, Ive read it somewhere too but cant recall why they think its a crystal.
A majority of their knowledge comes from earthquakes and hydrogen/nuclear
explosions, and I've read a different article (discover(y?) magazine) on how
they now know from waves from things like that, that the surface of the outer
core is very jagged, definately not smooth, but they didnt say anything about
a crystal, so puting the two together I've always thought of the outer core
to be a crystal and the inner core being a much denser crystal, and the
mantle being an ocean with currents and such playing off the energies of the
core. The dynamic relationship between the two crystals and the mantle must
be very interesting.
danny