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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; deccantraps; gertakeller; 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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To: UnklGene
Man, when we finally find out wht happened to the dinosaurs, we're really goin to......what are we going to do?
21 posted on 09/15/2003 11:00:41 PM PDT by Consort
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To: LiteKeeper
Try lot's and lot's of water, covering the whole earth!

But where'd all the water go? (For just one problem...)

22 posted on 09/16/2003 12:11:44 AM PDT by jennyp (http://crevo.bestmessageboard.com)
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To: UnklGene
Actually, I think it was all planned obsolesence. Dinosaurs had to all die off at that particular time so they would be petrolum now for all of our SUV's. Somebody way back then did the math.

Red

23 posted on 09/16/2003 12:50:41 AM PDT by Conservative4Ever (life is but a dream...Sha Boom)
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To: blam; RadioAstronomer; longshadow; PatrickHenry
I still think the impact in Chicxulub triggered the formation of the Deccan Traps...between the two events, the dinos were toast.
24 posted on 09/16/2003 12:56:19 AM PDT by Aracelis
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To: Piltdown_Woman
The more you know about dinos, the more you realize that the cause of their extinction was unprotected sex. (I know so many things ...)
25 posted on 09/16/2003 3:39:29 AM PDT by PatrickHenry
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To: jennyp
Land masses rose, mountains were created, and what we now know of as oceans were formed.
26 posted on 09/16/2003 7:11:29 AM PDT by LiteKeeper
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To: Piltdown_Woman
I'm WAY late for this thread, but the whole debate thus far was summed up best in a book called NIGHT COMES TO THE CRETACEOUS. The evidence for both the K-T Impact AND Dinosaur extinction being at the end of the Cretaceous (rather than at an earlier point) is overwhelming. Gerta Keller is one of only a handful of scientists remaining who's made a career out taking the contrarian view. The portrait of her in the book mentioned above (or at least the depiction of her as an ethical scientist) is not flattering. While I won't judge someone on secondhand information, her track record has not been good in those areas I've been able to check.

Just thought I'd add my 2 cents as you might find that book interesting. :-)

27 posted on 10/14/2003 4:38:53 PM PDT by Reverend Bob
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To: Reverend Bob
That and T.Rex and the Crater of Doom by Walter Alvarez
28 posted on 10/14/2003 4:44:17 PM PDT by null and void
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To: blam
It was the Chixlub Crater in Mexico 65 million years ago that killed the dinasaurs.

Perhaps it was both. A jolt from an asteroid strike would doubtless set off strings of earthquakes and eruptions wherever conditions were on the edge

29 posted on 10/14/2003 4:48:04 PM PDT by SauronOfMordor (Java/C++/Unix/Web Developer === (Finally employed again! Whoopie))
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To: UnklGene
"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.

Wiiild and Craaaazy guys those EOP scientists, anything for a laugh.

Hey, you dropped your pocket protector!
Zuuuuuuup!
30 posted on 10/14/2003 4:54:36 PM PDT by tet68 (multiculturalism is an ideological academic fantasy maintained in obvious bad faith. M. Thompson)
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To: concerned about politics
However, at this earlier time there is no evidence of any asteroid impact.

This doesn't mean that such an event did not occur...only that there is no evidence as of yet.

31 posted on 10/15/2003 12:31:21 AM PDT by Aracelis
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To: blam
It was the Chixlub Crater in Mexico 65 million years ago that killed the dinasaurs.

More specifically, it was most likely the bolide which resulted in the crater's formation that was responsible for the extinction of dinosaurs.

32 posted on 10/15/2003 12:33:05 AM PDT by Aracelis
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To: Reverend Bob
The evidence for both the K-T Impact AND Dinosaur extinction being at the end of the Cretaceous (rather than at an earlier point) is overwhelming.

Indeed, but I'm part of the lunatic fringe that believes bolide impacts were responsible for the formation of the Deccan Traps...thus sealing the fate of the dinos either by the impact itself, or the atmospheric changes associated with extensive volcanism.

33 posted on 10/15/2003 12:37:43 AM PDT by Aracelis
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To: null and void
the Crater of Doom by Walter Alvarez

I was so taken with his work that I named our very fertile Guinea Pig after him. "Alvarez-Piggers"! You've gone to the Great Pig-Pen in the sky! Sigh...miss that Pig.

34 posted on 10/15/2003 12:40:04 AM PDT by Aracelis
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To: UnklGene
I'm still on the "giant asteroid hits" theory. That's one huge crater that helped create the Gulf of Mexico.
35 posted on 10/15/2003 12:41:11 AM PDT by Fledermaus (Wake Up America, You're Dreaming!)
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To: Alter Kaker
I'm with you. I buy the bird theory. It makes so much sense with the evidence.

36 posted on 10/15/2003 12:42:17 AM PDT by Fledermaus (Wake Up America, You're Dreaming!)
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To: Conservative4Ever
ROFL, good point. But I don't understand this...if it's "fossil fuel" that created the so-called finite supply of oil, doesn't that assume things stopped dying after the dinasours since we keep finding more and more oil?
37 posted on 10/15/2003 12:44:03 AM PDT by Fledermaus (Wake Up America, You're Dreaming!)
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To: SauronOfMordor
Perhaps it was both. A jolt from an asteroid strike would doubtless set off strings of earthquakes and eruptions wherever conditions were on the edge

Which was the topic of my Senior Thesis...however, my advisor thought it too ambitious of a project for an undergrad (and a woman), and thus my "thesis" never had any support. But I still hold the view that a big ol' "smack" on one side of the globe could and would trigger massive volcanism on the other side of the globe.

Any MEN wanna take on the project? I'll help, IF you list me a co-author.

38 posted on 10/15/2003 12:44:36 AM PDT by Aracelis
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To: SauronOfMordor
Very good. I like that idea. A massive asteroid that would create such a crater near a land fault would, it seems, instigate shifts and turmoil that could start volcanic eruptions or even just the release of gases, etc.

39 posted on 10/15/2003 12:46:15 AM PDT by Fledermaus (Wake Up America, You're Dreaming!)
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To: Fledermaus
But I don't understand this...if it's "fossil fuel" that created the so-called finite supply of oil, doesn't that assume things stopped dying after the dinasours since we keep finding more and more oil?

I seem to vaguely recall an article which postulated that oil is still being created today, however at a much slower rate than what created the fossil fuels we enjoy today. If you would like, I'll try to dig up the reference.

40 posted on 10/15/2003 12:48:00 AM PDT by Aracelis
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To: Piltdown_Woman
I agree with you contention. We see earthquakes today in one part of the world followed by tremors around the globe which shows the movement of tetonic plates.

A shift in California sends pressure into the plate that gives in a shift in India or Japan or China.
41 posted on 10/15/2003 12:48:51 AM PDT by Fledermaus (Wake Up America, You're Dreaming!)
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To: Piltdown_Woman
And just as I posted that, I read a story that there was an earthquake in Tokyo. Let's see if we have one in the US in a week or so.
42 posted on 10/15/2003 12:50:19 AM PDT by Fledermaus (Wake Up America, You're Dreaming!)
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To: Fledermaus
Exactly my thoughts. We live on a dynamic planet.
43 posted on 10/15/2003 12:51:22 AM PDT by Aracelis
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To: All
You folks obviously have no grand kids with whom you watched "The Land Before Time" movies endlessly.If you did you would know that it was most likely "Sarah" the obnoxious trisaratop who caused the mass extinction. She always thought she knew more than "Little Foot" She may have been the very first democrat ever on earth.
44 posted on 10/15/2003 12:53:22 AM PDT by Graybeard58
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To: Piltdown_Woman
I read that in the Gulf of Mexico, it's flowing out of the bottom so freely they want to see if they can capture it. I even think a geoligist in Cuba, of all places, did the most research on the project.

I also read an article that theorizes "fossil fuel" is more than just that and oil is actually created under the Earth's crust and released.

And then there is technology. Back in the early 1970's the oil reserve estimates on the planet were so low compared to known reserves today it's laughable.
45 posted on 10/15/2003 12:56:12 AM PDT by Fledermaus (Wake Up America, You're Dreaming!)
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To: Fledermaus
I read a story that there was an earthquake in Tokyo. Let's see if we have one in the US in a week or so.

You may be interested in this website: Syzygyjob.com. Jim Berkland worked for the USGS until his earthquake predictions became too accurate, and they asked him to leave. He bases his predictions on tidal stresses caused by positions of the Sun and the Moon relative to our Earth (amongst other things). I find his work fascinating.

46 posted on 10/15/2003 12:58:09 AM PDT by Aracelis
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To: Graybeard58
She may have been the very first democrat ever on earth.

That's it!!!! Democrats caused the demise of the dinosaurs! Kids everywhere will be so displeased...and we'll get a whole new crop of Republicans. You've solved everything! :^)

47 posted on 10/15/2003 1:00:30 AM PDT by Aracelis
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To: Graybeard58
Hehe...my oldest daughter is named "Sarah"...we used to call her "Triceratopsian Sarah". Alas, she didn't like the moniker...but she knows her Triceratops now! :^)
48 posted on 10/15/2003 1:02:10 AM PDT by Aracelis
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To: Fledermaus
"I read that in the Gulf of Mexico, it's flowing out of the bottom so freely they want to see if they can capture it. "

Yup, I've read about that, seems this oil 'polution' in the Gulf is 'self-cleaning' and does not cause a threat to the animals and beaches.

49 posted on 10/15/2003 8:51:08 AM PDT by blam
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To: Piltdown_Woman; Fledermaus
Which was the topic of my Senior Thesis...however, my advisor thought it too ambitious of a project for an undergrad (and a woman), and thus my "thesis" never had any support.

It would have been an impressive amount of analytical work, and I'm sorry he didn't let you do it. I've done a lot of reading about hydrostatic shock, in the context of what happens when a small supersonic object hits a large, fluid-filled object (ie, bullet hitting body).

I'm sure that a large object hitting the earth at 7+ miles/sec would generate some really impressive shock waves. Doing a good simulation of how they would travel through the earth (and taking into account wave reflection and refraction as the waves go through various boundary layers ) would be impressive even as a master's thesis

50 posted on 10/15/2003 3:57:52 PM PDT by SauronOfMordor (Java/C++/Unix/Web Developer === (Finally employed again! Whoopie))
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