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Scientists turn textbook volcanic eruption theory on its head
Zeenews (India) ^ | Tuesday, September 9, 2014 | ANI

Posted on 09/13/2014 12:52:15 PM PDT by SunkenCiv

Researchers at Caltech and the University of Miami in Florida found that the volcano pictures, such as those that are forming the Hawaiian Islands, illustrate that it erupts when magma gushes out as narrow jets from deep inside Earth but those pictures are wrong.

Don Anderson, the Eleanor and John R. McMillian Professor of Geophysics, Emeritus, at Caltech said that new seismology data are now confirming that such narrow jets don't actually exist.

He further explained that, in fact, basic physics doesn't support the presence of these jets, called mantle plumes, and the new results corroborated those fundamental ideas.

It was mentioned that no one has been able to detect the predicted narrow plumes, although the evidence has not been conclusive... Very broad features beneath the surface have been interpreted as plumes or super-plumes, but, still, they're far too wide to be considered narrow jets.

But now, due to more seismic stations spaced closer together and improved theory, analysis of the planet's seismology was good enough to confirm that there are no narrow mantle plumes. Instead, data reveal that there are large, slow, upward-moving chunks of mantle a thousand kilometers wide.

The new measurements suggested that instead of narrow jets, there are broad upwellings, which are balanced by narrow channels of sinking material called slabs. What was driving this motion was not heat from the core, but cooling at Earth's surface.

The results also have an important consequence for rock compositions, notably the ratios of certain isotopes.According to the mantle-plume idea; the measured compositions derive from the mixing of material from reservoirs separated by thousands of kilometers in the upper and lower mantle. But if there are no mantle plumes, then all of that mixing must have happened within the upwellings and nearby mantle in Earth's top 1,000 kilometers.

(Excerpt) Read more at zeenews.india.com ...


TOPICS: Astronomy; Science
KEYWORDS: catastrophism; continentaldrift; earthquake; earthquakes; platetectonics; volcano
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To: SunkenCiv

“Molten hot magma.”


21 posted on 09/13/2014 8:06:25 PM PDT by Oratam
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To: Steely Tom
I thought there was a “scientific consensus” on volcano eruptions.

There will be a new push as to why these scientists have to be wrong -- From the article: What was driving this motion was not heat from the core, but cooling at Earth's surface.

They obviously didn't get the message that the Earth's surface never be referred to as "cooling".

22 posted on 09/14/2014 3:41:06 AM PDT by trebb (Where in the the hell has my country gone?)
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To: trebb
How did I miss that? Thanks!

I think you're being too logical.

It's perfectly within the bounds of possibility that these people will next be explaining to us that the surface of the earth can be cooling even though the atmosphere is warming.

23 posted on 09/14/2014 5:18:05 AM PDT by Steely Tom (Thank you for self-censoring.)
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24 posted on 11/14/2021 12:50:56 PM PST by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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