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NEW EVIDENCE THAT VOLCANOS KILLED THE DINOSAURS -
Red Nova ^ | September 15, 2003

Posted on 09/15/2003 8:48:14 PM PDT by UnklGene

September 15, 2003

Could an enormous volcanic eruption have killed the dinosaurs?

Cardiff University -- The extinction of the dinosaurs -– thought to be caused by an asteroid impact some 65 million years ago –- was more likely to have been caused by a 'mantle plume' -– a huge volcanic eruption from deep within the earth's mantle, the region between the crust and the core of the earth.

This theory, already supported by a significant body of geologists and palaeontologists, is strengthened by new evidence to be presented at an international conference at Cardiff University on 11-12 September.

Research by an American earth scientist, Professor Gerta Keller and her team, suggests that a similar eruption under the Indian Ocean several million years before the extinction of the dinosaurs had a similarly devastating impact on the environment.

However, at this earlier time there is no evidence of any asteroid impact.

Her findings are based on analysis of microfossil assemblages, which were found inside cores that had been drilled deep into sediments on the ocean floor.

The eruptions that were responsible for these two extinction events were as a result of mantle plumes -– a phenomenon caused by rising hot mantle from deep within the earth.

Likened to the actions of a lava lamp, the mantle's heat causes it to rise and mushroom out; it then flattens causing the mantle to melt and erupt magma over the earth's surface and across an area of some 1,000 kilometres diameter.

These eruptions last between one and two million years and more than one million cubic kilometres of lava can be erupted in that time.

Today, we can witness seven huge remnants of such mantle plume activity. These are also known as 'hotspots' and are responsible for the volcanic activity on Iceland, the islands of Hawaii, Easter, Reunion, Tristan and Louisville as well as volcanism in the Afar region of Ethopia.

"Mantle plumes are literally a hot topic for debate," said conference organiser Dr Andrew Kerr of Cardiff University's School of Earth, Ocean and Planetary Sciences.

"They are a catalyst for the formation of ocean basins and fundamentally reshaping the earth's surfaces. The massive outpouring of lava, ashes, and gas can have significant effects on climate, which destabilises the environment and have the potential to dictate the course of evolution. It is likely that were it not for mantle plumes, mammals would not have become predominant, and humankind would not be here today.

"Bizarrely, amongst earth scientists, there is also a vocal minority who don't believe that mantle plumes exist at all. This conference is therefore an opportunity to address these issues and validity of the links between mantle plumes with the evolution of life by bringing together geophysicists, petrologists and palaeontologists."


TOPICS: History; Science; Travel
KEYWORDS: catastrophism; chicxulub; deccantraps; gertakeller; godsgravesglyphs; history; paleontology
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1 posted on 09/15/2003 8:48:14 PM PDT by UnklGene
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To: UnklGene
Ahhh! But we all know the real reason, don't we? George W. Bush's tax cuts for the "rich."
2 posted on 09/15/2003 8:50:16 PM PDT by UnklGene
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To: UnklGene
Ahhh! But we all know the real reason, don't we? George W. Bush's tax cuts for the "rich."

"Women, minorities... and dinosaurs affected most?"

3 posted on 09/15/2003 8:53:12 PM PDT by Gunslingr3
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To: UnklGene
However, at this earlier time there is no evidence of any asteroid impact.

True to Darwinism. Just a "guess."

4 posted on 09/15/2003 8:57:55 PM PDT by concerned about politics (Lucifers lefties are still stuck at the bottom of Maslow's Hierarchy)
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To: UnklGene
I thought it was the Internal Combustion Engine.
5 posted on 09/15/2003 8:59:26 PM PDT by CAfraudPI
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To: Gunslingr3
"...suaropods and minorities hardest hit."
6 posted on 09/15/2003 9:01:40 PM PDT by Atlas Sneezed
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To: blam
ping
7 posted on 09/15/2003 9:01:55 PM PDT by Slicksadick
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To: concerned about politics
True to Darwinism. Just a "guess."

So, geological studies are now "Darwinisim". Man, you're way out there....

8 posted on 09/15/2003 9:05:40 PM PDT by narby
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To: Gunslingr3
Scientific researchers, speaking off the record, suggested that "second hand smoke" may have done them in.
9 posted on 09/15/2003 9:06:58 PM PDT by muawiyah
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To: muawiyah

10 posted on 09/15/2003 9:14:28 PM PDT by Harmless Teddy Bear (Retribution is inevitable. Sometimes, it's just not a good time to sing Kum-by-yah.)
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To: UnklGene
No, no, no, it was the meteors, that's what the big brains keep trying to cram down our throats about everything these days.
11 posted on 09/15/2003 9:17:54 PM PDT by KellyAdmirer
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To: CAfraudPI
Pow

and Global Warming caused by humans
12 posted on 09/15/2003 9:26:21 PM PDT by Maelstrom (To prevent misinterpretation or abuse of the Constitution:The Bill of Rights limits government power)
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To: narby
So, geological studies are now "Darwinisim". Man, you're way out there....

However, at this earlier time there is no evidence of any asteroid impact.

13 posted on 09/15/2003 9:27:09 PM PDT by concerned about politics (Lucifers lefties are still stuck at the bottom of Maslow's Hierarchy)
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To: UnklGene
I thought it was SUVs
14 posted on 09/15/2003 9:27:25 PM PDT by woofie
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To: Slicksadick
Thanks for the ping.

It was the Chixlub Crater in Mexico 65 million years ago that killed the dinasaurs.

15 posted on 09/15/2003 9:34:59 PM PDT by blam
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To: UnklGene
I'm just glad they are extinct no matter how cool it would be to see them alive. I think they would be more than a handful for humans. Monitor lizards, perhaps crocs and gators I think are the closest we have to dinosaurs and I would never want to come across one of those in my backyard. Those examples would be babies in comparison.
16 posted on 09/15/2003 9:45:32 PM PDT by xp38
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To: xp38
No. Birds, dirty stinking birds, are direct descendent of dinosaur. Move to China - they have no birds.
17 posted on 09/15/2003 10:14:57 PM PDT by Alter Kaker (Whatever tears one may shed, in the end one always blows one’s nose.-Heine)
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To: blam
It was the Chixlub Crater in Mexico 65 million years ago that killed the dinasaurs.

Strange article didn't mention the Yellowstone Hot Spot (mantle plume?). They made light of the truly catastrophic event (meteor strike) and blamed volcanism averaging .5 to 1 km3 per year over a 1-2 million year period?

18 posted on 09/15/2003 10:44:41 PM PDT by Mike Darancette (Por La Raza Mierda.)
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To: UnklGene
Did they discover some real unusual carvings at Pompeii?
19 posted on 09/15/2003 10:52:19 PM PDT by william clark
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To: UnklGene
Try lot's and lot's of water, covering the whole earth!
20 posted on 09/15/2003 10:58:05 PM PDT by LiteKeeper
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