Washington: Researchers have recently revealed that volcanoes theory shown in the typical textbooks might not be exactly correct.
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 ...
Washington: Researchers have recently revealed that volcanoes theory shown in the typical textbooks might not be exactly correct.
Textbook Theory Behind Volcanoes May Be Wrong
September 10, 2014
http://www.redorbit.com/news/science/1113230917/volcanic-mantle-plumes-may-not-exist-091014/
Volcanoes’ Mantle Plumes Debunked
http://www.natureworldnews.com/articles/8951/20140909/volcanoes-mantle-plumes-debunked.htm
Mantle plume
The neutrality of this article is disputed. Relevant discussion may be found on the talk page. Please do not remove this message until the dispute is resolved. (January 2014)
http://en.wikipedia.org/wiki/Mantle_plume
Do Continents Really Drift? [2000]
http://www.science-frontiers.com/sf127/sf127p12.htm
Glitches In The Terrestrial Conveyor Belt [1998]
http://www.science-frontiers.com/sf118/sf118p11.htm
Miles Of Mush [1998]
http://www.science-frontiers.com/sf116/sf116p11.htm
Fossil Mantle Plume Under South America [1996]
http://www.science-frontiers.com/sf103/sf103g09.htm
Well, someone had to research this.
If you have ever been to Hawaii and visited the old lava tubes, this would be pretty evident.
But it took some liberal educator to “educate” the rest of us about what is commonly evident.
I thought there was a “scientific consensus” on volcano eruptions.
It's always good to remember that there is no such thing as settled science: if it's settled, it's not science, and if it's science, it's not settled.
Bulges!
Skinny vents don’t bulge. LOL! :-)
And only “climatologists” seem to be fixated on consensus.
Egads. With Global Warming, we won't be able to cool the magma at the earth's surface and volcanic eruptions are going to be more frequent and will spew more lava all over the place! Head for the hills!
Remember, you heard it on FR first.
So, I cut science a lot of slack and I don't laugh when I find out that volcanic plumes haven't been detected, and don't actually exist -- although I've been taught about these things for almost 50 years.
What annoys me is when so-called "scientists" harangue me and call me ignorant because I believe things which they laugh at and they demand that I "prove" the things I believe.
Science is pretty much a religion. It depends a lot on faith. That doesn't mean it's wrong, and doesn't me it's bad. But it's not real different from my religion either.
well said.
“The notion of scientific “proof” is very different from mathematical “proof”.”
Agreed.
Indeed there are very few scientific laws and many many many scientific theories and hypothesi. (Is that the plural or is it hypothesises ;)
:’D
Kind of reminds me of the argument that sea levels are rising due to global warming, when what we are actually seeing is subsidence of coastal soil due to compaction.
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