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Earth's Core Has Another Layer, Scientists Claim
LiveScience.com ^ | 12/8/10 | Charles Q. Choi

Posted on 12/08/2010 12:01:06 PM PST by NormsRevenge

What may be a new outermost layer of the Earth's core has been found, geoscientists have revealed.

This discovery could help solve mysteries of the planet's magnetic field, researchers say.

The Earth's core is composed mainly of iron, divided into a solid inner center roughly 1,500 miles (2,440 kilometers) wide covered by a liquid outer layer about 1,400 miles (2,250 km) thick. Even though the bulk of the core is iron, researchers also knew it contained a small amount of lighter elements such as oxygen and sulfur. As the inner core crystallized over time, scientists think this process forced out most of these light elements, which then migrated through the liquid outer core.

Now geoscientists think they have detected all these light elements concentrated in the outermost parts of the core.

"Ever since core structure started to be studied, there were hints of structure there — that's why we looked for it," said researcher George Helffrich, a geologist and seismologist at the University of Bristol in England.

Seismic speed changes

To investigate the core, researchers monitored seismic waves that traveled through its outer layer. The waves were generated by earthquakes in South America and the southwestern Pacific Ocean, and were recorded using arrays of seismometers in Japan and northern Europe.

The speeds at which seismic waves traveled through the outer core at different depths suggest that its composition does not remain the same all the way through. Instead, the uppermost 185 miles (300 km) or so is a distinct structure, with the section nearest the boundary consisting up to 5 percent by weight of light elements.

"The seismic structure we found is hard to deny — the signal is obvious to the eye in the data that we used," Helffrich told OurAmazingPlanet.

(Excerpt) Read more at livescience.com ...


TOPICS: Culture/Society; Miscellaneous
KEYWORDS: catastrophism; core; earth; geoscience; jmarvinherndon; layer; magneticfield; magnetism; poleshift; scientists
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1 posted on 12/08/2010 12:01:09 PM PST by NormsRevenge
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To: NormsRevenge

Wow. This could shake the field of Seismology to the... well, CORE.


2 posted on 12/08/2010 12:03:16 PM PST by WayneS (Enlightened statesmen will not always be at the helm. -- James Madison)
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To: P-Marlowe

Come on, we all know the earth is hollow!


3 posted on 12/08/2010 12:04:44 PM PST by Gamecock
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To: NormsRevenge

“geoscientists have revealed”

Ha. Check the premise. Not “have discovered”, but “have revealed”, like “they knew all along, but they just decided to tell you now”.


4 posted on 12/08/2010 12:05:17 PM PST by Christian Engineer Mass (Leftys who zone in on Palin miss the point. America's not about single figures. That's for NK/Cuba.)
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To: NormsRevenge

That would be the creamy vanilla pudding layer.
yumm!


5 posted on 12/08/2010 12:06:14 PM PST by SparkyBass
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To: NormsRevenge; Gamecock
What's this new layer called? Pellucidar?


6 posted on 12/08/2010 12:06:57 PM PST by Alex Murphy ("Posting news feeds, making eyes bleed, he's hated on seven continents")
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To: NormsRevenge
Yet they still are covering up the existence of hollow earth. You can't trust those scientists, always changing what they believe under the guise of 'new discoveries' or 'expanding knowledge'. What has science done for us in the last 100 years? Sadly, a /sarc tag is needed for some.
7 posted on 12/08/2010 12:07:17 PM PST by mnehring
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To: SparkyBass

It would be the (political) science b/s layer. Miles thick.


8 posted on 12/08/2010 12:07:51 PM PST by Jim Robinson (Rebellion is brewing!! Nuke the corrupt commie bastards to HELL!!)
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To: SparkyBass; NormsRevenge

MMmmmm... caramel and nuget...
Mmmmmmmm.


9 posted on 12/08/2010 12:08:43 PM PST by Darksheare (I shook hands with Sheryl Crow and all I got was Typhus and a single sheet of toilet paper.)
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To: NormsRevenge

Just like ‘Tootsie Roll” or in mystic parlance, “As Above So Below”.


10 posted on 12/08/2010 12:09:56 PM PST by de.rm (Bang, bang, . . bang. Shhh=Bush, the elder, E. Howard Hunt, LBJ, Mrs, Edgar Hoover)
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To: WayneS

Oxygen and Sulfur...
Well that stinks.


11 posted on 12/08/2010 12:13:16 PM PST by DannyTN
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To: Jim Robinson

... and impenetrable! :)


12 posted on 12/08/2010 12:13:44 PM PST by SparkyBass
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To: de.rm

I always hated the tootsie roll commercials.
Everything he saw became tootsie roll.
Serious psychological issue theres.
Next thing you know, he’s chewing on someones arm.


13 posted on 12/08/2010 12:14:25 PM PST by Darksheare (I shook hands with Sheryl Crow and all I got was Typhus and a single sheet of toilet paper.)
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To: NormsRevenge

The aliens living inside the hollow earth dispute this hoax.


14 posted on 12/08/2010 12:16:56 PM PST by Iron Munro (This is our culture; fight for it. This is our flag; pick it up. This is our country; take it back.)
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To: NormsRevenge

It’s hidden in moochie’s caboose.


15 posted on 12/08/2010 12:17:29 PM PST by Carley (ISRAEL.......NOT SO ALONE!!!)
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To: Darksheare
"How about a nice Hawaiian punch?"
16 posted on 12/08/2010 12:17:42 PM PST by de.rm (Bang, bang, . . bang. Shhh=Bush, the elder, E. Howard Hunt, LBJ, Mrs, Edgar Hoover)
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To: Jim Robinson

LOL


17 posted on 12/08/2010 12:18:00 PM PST by Constitution Day
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To: NormsRevenge
Earth's Core Has Another Layer, Scientists Claim

Well obviously, that's where our Global Warming went.

18 posted on 12/08/2010 12:20:15 PM PST by meadsjn (Sarah 2012, or sooner)
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To: NormsRevenge
Whoa, look at the X-Rays.


19 posted on 12/08/2010 12:21:07 PM PST by USS Alaska
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To: NormsRevenge

In foot note 436,it was noted that seismospectographic analysis of the new layer strata strongly hinted at a band of gold interspersed with silver and rubidium.


20 posted on 12/08/2010 12:21:12 PM PST by bert (K.E. N.P. N.C. D.E. +12 .....( History is a process, not an event ))
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