Posted on 07/31/2015 9:55:30 AM PDT by JimSEA
Since 2010, the best estimate of the age of Earth's magnetic field has been 3.45 billion years. But now a researcher responsible for that finding has new data showing the magnetic field is far older.
John Tarduno, a geophysicist at the University of Rochester and a leading expert on Earth's magnetic field, and his team of researchers say they believe the Earth's magnetic field is at least four billion years old.
(Excerpt) Read more at sciencedaily.com ...
I know this is kind of geek stuff but I find it fascinating.
Yet Greenies think that man can destroy the earth......
Brian Williams said he was there, then.
Just ask him.
Or save it.
Yes that too!
given four billion years the green commie “liberals” would still be doing study groups to determine ecological impact on any and all plans to “save the planet”
Gee, so what else could scientists possibly be “wrong” about?
Yeah, God must be laughing!
Shouldn’t there have been a magnetic field for as long as there has been a spinning iron core? That would be pretty much as long as there has been an Earth.
But when did the earth start spinning?
My favorite statistic is that the Earth weighs 13,170,000,000,000,000,000,000,000 lbs, yet a 100 lb liberal thinks he can save it. Can we say ‘God complex?’ It remains to be seen whether God is laughing or frowning.
Yeah, it’s the motion of the currents in the mantel from the core to the crust and back again as the heated material cools the generates the field. It’s hard to see this heat exchange without a crust.
That's more than Rosie O'Donnell.
Cordially,
3.45 billion vs. 4 billion; what’s .55 billion among FRiends, anyway?
Exactly, that’s all it takes. But, not being an expert, I was sitting here speculating why geologists would think the early Earth’s core wasn’t spinning? The Earth had just formed. Were the interior dynamics of the planet too chaotic at that point or something? I’m glad you asked the question.
When God said so.
Apparently, if there is convection of the outer core not much spin is needed.
Convection is important. Compare to Venus and it’s lack of an internal magnetic field.
https://en.wikipedia.org/wiki/Venus#Magnetic_field_and_core
Lol, I’d like to see this giant iron ball we live on start rolling down hill, and a liberal like Rosie step out in front of it to save it.
Good comparison.
Fascinating, thanks. Still trying to digest it all. It’s much more complicated than I thought. Will definitely be reading that article more than once!
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