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Re: Belief in Earth's Iron Core still puzzling
I got the idea that CharlieO thought an already formed Earth acquired it's iron through meteor impacts. Instead as Pyro pointed out the Earth formed from debris that already had a high proportion of iron, not from impacts after the fact. I've seen many people who seemed think this, it's also important to understand the Earth Orpheus collision allowed the Earth to acquire a huge amount of iron while shedding a more than moon sized mass of lighter elements and water, leaving the Earth with a larger than average core for it's size and higher average density as compared to say Venus. In "Rare Earth" by Ward and Brownlee they propose the Earth would have been a water world without this collision and the Earths large core contributes to not only it's Magnetic Field but to Continental Drift as well.
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Michael
Life is the poetry of the universe.
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