Free Republic
Browse · Search
News/Activism
Topics · Post Article

Skip to comments.

Giant Crater Found [in Antarctica]: Tied to Worst Mass Extinction Ever [Permo-Triassic]
SPACE.com ^ | June 2, 2006 | Robert Roy Britt

Posted on 06/02/2006 11:44:43 AM PDT by cogitator

An apparent crater as big as Ohio has been found in Antarctica. Scientists think it was carved by a space rock that caused the greatest mass extinction on Earth, 250 million years ago.

The crater, buried beneath a half-mile of ice and discovered by some serious airborne and satellite sleuthing, is more than twice as big as the one involved in the demise of the dinosaurs.

The crater's location, in the Wilkes Land region of East Antarctica, south of Australia, suggests it might have instigated the breakup of the so-called Gondwana supercontinent, which pushed Australia northward, the researchers said.

"This Wilkes Land impact is much bigger than the impact that killed the dinosaurs, and probably would have caused catastrophic damage at the time," said Ralph von Frese, a professor of geological sciences at Ohio State University.

How they found it

The crater is about 300 miles wide. It was found by looking at differences in density that show up in gravity measurements taken with NASA's GRACE satellites. Researchers spotted a mass concentration, which they call a mascon—dense stuff that welled up from the mantle, likely in an impact.

"If I saw this same mascon signal on the Moon, I'd expect to see a crater around it," Frese said. (The Moon, with no atmosphere, retains a record of ancient impacts in the visible craters there.)

So Frese and colleagues overlaid data from airborne radar images that showed a 300-mile wide sub-surface, circular ridge. The mascon fit neatly inside the circle.

"And when we looked at the ice-probing airborne radar, there it was," he said today.

Smoking gun?

The Permian-Triassic extinction, as it is known, wiped out most life on land and in the oceans. Researchers have long suspected a space rock might have been involved. Some scientists have blamed volcanic activity or other culprits.

The die-off set up conditions that eventually allowed dinosaurs to rule the planet.

The newfound crater is more than twice the size of the Chicxulub crater in the Yucatan peninsula, which marks the impact that may have ultimately killed the dinosaurs 65 million years ago. The Chicxulub space rock is thought to have been 6 miles wide, while the Wilkes Land meteor could have been up to 30 miles wide, the researchers said.

Confirmation needed

Postdoctoral researcher Laramie Potts assisted in the discovery.

The work was financed by NASA and the National Science Foundation. The discovery, announced today, was initially presented in a poster paper at the recent American Geophysical Union Joint Assembly meeting in Baltimore.

The researchers say further work is needed to confirm the finding. One way to do that would be to go there and collect rock from the crater to see if its structure matches what would be expected from such a colossal impact.


TOPICS: Culture/Society; Government; Miscellaneous; News/Current Events
KEYWORDS: antarctic; antarctica; australia; bushsfault; catastrophism; dinosaurs; extinction; godsgravesglyphs; impact; inconvenienttruth; permian; triassic
Navigation: use the links below to view more comments.
first 1-5051-100101-128 next last
I'd have to read more; I want to know why they think this impact occurred 250 million years ago. Still, it's cool that they found a really big impact structure in Antarctica.
1 posted on 06/02/2006 11:44:47 AM PDT by cogitator
[ Post Reply | Private Reply | View Replies]

To: 2Trievers; headsonpikes; Pokey78; Lil'freeper; epsjr; sauropod; kayak; Miss Marple; CPT Clay; ...

* ping *


2 posted on 06/02/2006 11:45:17 AM PDT by cogitator
[ Post Reply | Private Reply | To 1 | View Replies]

To: cogitator

http://www.freerepublic.com/focus/f-news/1641966/posts

Not a dupe post but FR had it before Space.com

;-)


3 posted on 06/02/2006 11:46:12 AM PDT by LesbianThespianGymnasticMidget (God punishes Conservatives by making them argue with fools.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: cogitator

Bush's fault. I don't know how, but he's behind it.


4 posted on 06/02/2006 11:46:18 AM PDT by theDentist (Qwerty ergo typo : I type, therefore I misspelll. 17,400+ snide replies and counting!)
[ Post Reply | Private Reply | To 1 | View Replies]

To: cogitator

Two days after the impact, Nancy Pelosi toured the devastated area and derided the administration for lack of leadership.


5 posted on 06/02/2006 11:47:20 AM PDT by trublu
[ Post Reply | Private Reply | To 1 | View Replies]

To: cogitator

Gravity fluctuations beneath East Antarctica measured by GRACE satellite. Denser regions appear more red; the location of the Wilkes Land crater is circled (above center). Credit: Ohio State University

6 posted on 06/02/2006 11:49:06 AM PDT by Red Badger (Liberals ignore criminal behavior, reward sloth and revere incompetence...........)
[ Post Reply | Private Reply | To 1 | View Replies]

To: cogitator

Cool post


7 posted on 06/02/2006 11:49:15 AM PDT by Woodstock
[ Post Reply | Private Reply | To 1 | View Replies]

To: cogitator
Just the landing crater for the Shoggoths.

Tekeli-li!

8 posted on 06/02/2006 11:49:38 AM PDT by akorahil (Thank You and God bless all Veterans. Truly, the real heroes.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: cogitator
Now that's a big bang! If only there was one 1/8 that size heading for Iran! Probably still too big to just limit damage to that wonderful Islamic paradise!!
9 posted on 06/02/2006 11:50:00 AM PDT by Empireoftheatom48 (God bless our troops!! Our President and those who fight against the awful commie, liberal left!!)
[ Post Reply | Private Reply | To 1 | View Replies]

To: Red Badger
Should be...

THE Ohio State University

Thank you.

10 posted on 06/02/2006 11:51:20 AM PDT by Bosco (Remember how you felt on September 11?)
[ Post Reply | Private Reply | To 6 | View Replies]

To: cogitator

I gots to get my eyes checked. I thought it said "Judge Crater found....


11 posted on 06/02/2006 11:51:43 AM PDT by stylin19a (Some mornings, it's just not worth chewing through the leather straps.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: SunkenCiv

ping as per our discussion on asteroids and comets


12 posted on 06/02/2006 11:52:26 AM PDT by sully777 (wWBBD: What would Brian Boitano do?)
[ Post Reply | Private Reply | To 1 | View Replies]

To: cogitator

The Boxing Day earthquake-tsunami changed time on earth by a second...one wonders if the impact knocked earth off its axis?


13 posted on 06/02/2006 11:54:58 AM PDT by sully777 (wWBBD: What would Brian Boitano do?)
[ Post Reply | Private Reply | To 2 | View Replies]

To: akorahil

LOL.

"It was a terrible, indescribable thing vaster than any subway train – a shapeless congerie of protoplasmic bubbles, faintly self-luminous, and with myriads of temporary eyes forming and un-forming as pustules of greenish light all over the tunnel-filling front that bore down upon us, crushing the frantic penguins and slithering over the glistening floor that it and its kind had swept so evilly free of all litter."


14 posted on 06/02/2006 11:54:58 AM PDT by dhs12345
[ Post Reply | Private Reply | To 8 | View Replies]

To: cogitator

Jeez - imagine the energy released from a 30 miles wide rock hitting the Earth. Amazing that anything survived.


15 posted on 06/02/2006 11:55:34 AM PDT by stacytec (Nihilism, its whats for dinner)
[ Post Reply | Private Reply | To 1 | View Replies]

To: Bosco

The? There is no other university in Ohio? You poor guys need to get some more football players.........


16 posted on 06/02/2006 11:55:41 AM PDT by Red Badger (Liberals ignore criminal behavior, reward sloth and revere incompetence...........)
[ Post Reply | Private Reply | To 10 | View Replies]

To: cogitator

ALGORE landed here about that same time didn't he? Need i say more?


17 posted on 06/02/2006 11:57:02 AM PDT by lexington minuteman 1775
[ Post Reply | Private Reply | To 1 | View Replies]

To: dhs12345
What a great story!

Ol' Howard P. Knew his stuff about horror, I will say.

18 posted on 06/02/2006 11:57:43 AM PDT by akorahil (Thank You and God bless all Veterans. Truly, the real heroes.)
[ Post Reply | Private Reply | To 14 | View Replies]

To: sully777

Thanks.

http://www.freerepublic.com/focus/f-news/1642426/posts?page=3#3


19 posted on 06/02/2006 11:57:54 AM PDT by SunkenCiv (https://secure.freerepublic.com/donate/)
[ Post Reply | Private Reply | To 12 | View Replies]

To: cogitator

Very cool they found it. Jeez... 250 million years ago... You've got to wonder what earlier mass wipeouts occurred. There must've been many.


20 posted on 06/02/2006 11:57:56 AM PDT by LibWhacker
[ Post Reply | Private Reply | To 1 | View Replies]

To: cogitator
The crater, buried beneath a half-mile of ice and discovered by some serious airborne and satellite sleuthing, is more than twice as big as the one involved in the demise of the dinosaurs.

I didn't know that the "dinosaurs were killed by a meteor" theory had graduated to fact.

21 posted on 06/02/2006 11:58:03 AM PDT by kerryusama04 (Isa 8:20)
[ Post Reply | Private Reply | To 1 | View Replies]

To: cogitator

The newfound crater is more than twice the size of the Chicxulub crater in the Yucatan peninsula, which marks the impact that may have ultimately killed the dinosaurs 65 million years ago. The Chicxulub space rock is thought to have been 6 miles wide, while the Wilkes Land meteor could have been up to 30 miles wide, the researchers said.

---

A 30 mile wide chunk can leave a mark.

That it is under a thick layer of ice and they can still detect it is pretty cool.

Why 250 million years ago. and what else lies out there.. not sure. we need more spaceborne instruments, more eyes on the sky, it's a busy place out there, stuff flying all over..


22 posted on 06/02/2006 11:58:51 AM PDT by NormsRevenge (Semper Fi - "The Road to Peace in the Middle East runs thru Damascus.")
[ Post Reply | Private Reply | To 1 | View Replies]

To: Red Badger
If you're an Ohioan, the definite article i.e. - "The Ohio State University" - is seen as trying to be uppity by regular folks. Hence my post.

We have plenty of football players, thanks.

23 posted on 06/02/2006 11:59:23 AM PDT by Bosco (Remember how you felt on September 11?)
[ Post Reply | Private Reply | To 16 | View Replies]

To: kerryusama04
The newfound crater is more than twice the size of the Chicxulub crater in the Yucatan peninsula, which marks the impact that may have ultimately killed the dinosaurs 65 million years ago.

Ahhhh, answered my own question. It is so hard to take "scientists" seriously these days.

24 posted on 06/02/2006 12:00:38 PM PDT by kerryusama04 (Isa 8:20)
[ Post Reply | Private Reply | To 21 | View Replies]

To: cogitator


Interesting


25 posted on 06/02/2006 12:02:10 PM PDT by Tzimisce (How Would Mohammed Vote? Hillary for President! www.dndorks.com)
[ Post Reply | Private Reply | To 1 | View Replies]

To: akorahil
Tekeli-li!

Getting our geologic information from the Necronomicon are we?

26 posted on 06/02/2006 12:02:17 PM PDT by Mike Darancette (Make them go home!!)
[ Post Reply | Private Reply | To 8 | View Replies]

To: kerryusama04
I didn't know that the "dinosaurs were killed by a meteor" theory had graduated to fact.

That statement had good wording, because some of the absolute most recent K/T boundary research is downplaying the likelihood that the Chicxulub crater caused the extinction of the dinosaurs, and the climate change + increased volcanism theory is regaining lost ground.

27 posted on 06/02/2006 12:04:07 PM PDT by cogitator
[ Post Reply | Private Reply | To 21 | View Replies]

To: akorahil
Sorry, didn't read it. Just thought it was amusing and looked the creature up on the Internet. Sounds like you are recommending it. I will look for it at the book store.
28 posted on 06/02/2006 12:04:30 PM PDT by dhs12345
[ Post Reply | Private Reply | To 18 | View Replies]

To: cogitator

Now, that's how I want to die. Splat. Done.


29 posted on 06/02/2006 12:05:20 PM PDT by Integrityrocks
[ Post Reply | Private Reply | To 1 | View Replies]

To: kerryusama04

You've got a better answer?


30 posted on 06/02/2006 12:05:59 PM PDT by Lord_Baltar
[ Post Reply | Private Reply | To 21 | View Replies]

To: cogitator

Asteroid or comet triggered death of most species 250 million years ago

  Click on image for high-resolution version.
  Luann Becker, a University of Washington acting assistant professor of Earth and Space Sciences, holds a vial with buckminsterfullerenes extracted from sediment at the Permian-Triassic boundary. Equipment used to extract the molecules and a model "Buckyball" are in the background. (University of Washington Photo by Kathy Sauber)
 
Earth's most severe mass extinction - an event 250 million years ago that wiped out 90 percent of all marine species and 70 percent of land vertebrates - was triggered by a collision with a comet or asteroid, according to new findings by a team led by a University of Washington scientist.

The collision wasn't directly responsible for the extinction but rather triggered a series of events, such as massive volcanism and changes in ocean oxygen, sea level and climate. Those in turn led to species extinction on a wholesale level, said Luann Becker, UW acting assistant professor of Earth and Space Sciences.

"If the species cannot adjust, they perish. It's a survival-of-the-fittest sort of thing," Becker said. "To knock out 90 percent of organisms, you've got to attack them on more than one front."

 


 

Read more here:

http://www.washington.edu/newsroom/news/2001archive/02-01archive/k022201.html

 

....Bob


31 posted on 06/02/2006 12:06:26 PM PDT by Lokibob (Spelling and typos are copyrighted. Please do not use.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: cogitator

check out my post #24.


32 posted on 06/02/2006 12:06:43 PM PDT by kerryusama04 (Isa 8:20)
[ Post Reply | Private Reply | To 27 | View Replies]

To: akorahil

Lovecraft would be proud of you!


33 posted on 06/02/2006 12:07:30 PM PDT by Blzbba (Beauty is just a light switch away...)
[ Post Reply | Private Reply | To 8 | View Replies]

To: Lord_Baltar
You've got a better answer?

LOL! The Scientific Method as taught to me in the 7th Grade is dead.

34 posted on 06/02/2006 12:09:36 PM PDT by kerryusama04 (Isa 8:20)
[ Post Reply | Private Reply | To 30 | View Replies]

To: cogitator

It looks like they actually found Magneto's Antarctic lair, ha ha ha


35 posted on 06/02/2006 12:22:11 PM PDT by Gothmog
[ Post Reply | Private Reply | To 1 | View Replies]

To: cogitator

And Bush did nothing to prevent it.


36 posted on 06/02/2006 12:25:11 PM PDT by stop_fascism
[ Post Reply | Private Reply | To 1 | View Replies]

To: cogitator

Haliburton Hegemony Conspiracy did it


37 posted on 06/02/2006 12:26:12 PM PDT by blasater1960 ( Ishmaelites...Still a wild-ass of a people....)
[ Post Reply | Private Reply | To 1 | View Replies]

To: cogitator

Wow, glad it missed hitting me.....! :0 )


38 posted on 06/02/2006 12:27:53 PM PDT by geezerwheezer (get up boys, we're burnin' daylight!!!)
[ Post Reply | Private Reply | To 2 | View Replies]

To: Red Badger
You poor guys need to get some more football players.........

Why? Are prisons in danger of vacancies?

39 posted on 06/02/2006 12:30:12 PM PDT by Glenn (Annoy a BushBot...Think for yourself.)
[ Post Reply | Private Reply | To 16 | View Replies]

To: kerryusama04
It is so hard to take "scientists" seriously these days.

Right. Our religious leaders have done so much to explain the observable.

40 posted on 06/02/2006 12:31:56 PM PDT by Glenn (Annoy a BushBot...Think for yourself.)
[ Post Reply | Private Reply | To 24 | View Replies]

To: All

30 miles wide?!

ouch


41 posted on 06/02/2006 12:36:45 PM PDT by David Allen (the presumption of innocence - what a concept!)
[ Post Reply | Private Reply | To 40 | View Replies]

To: Glenn

No, we got all those in FSU............Florida State Criminoles.......


42 posted on 06/02/2006 12:38:53 PM PDT by Red Badger (Liberals ignore criminal behavior, reward sloth and revere incompetence...........)
[ Post Reply | Private Reply | To 39 | View Replies]

To: kerryusama04
I didn't know that the "dinosaurs were killed by a meteor" theory had graduated to

This impact was before there were dinosaurs.

43 posted on 06/02/2006 12:53:16 PM PDT by Mike Darancette (Make them go home!!)
[ Post Reply | Private Reply | To 21 | View Replies]

To: Bosco

Penn State 17 the Ohio State U. 10.


44 posted on 06/02/2006 1:08:15 PM PDT by Tulane
[ Post Reply | Private Reply | To 10 | View Replies]

To: cogitator
the climate change + increased volcanism theory is regaining lost ground.

Just a pair of cosmic coincidences that two gigantic colliders impacted the earth at two times of massive volcanic upheavals and two mass extinctions?

Maybe the collisions set off the volcanism which caused the climate change.

45 posted on 06/02/2006 1:17:44 PM PDT by Mike Darancette (Make them go home!!)
[ Post Reply | Private Reply | To 27 | View Replies]

To: Blzbba
Well, it's like he always said:
Cthulhu Mna 'Fth'ngui Fgthan
46 posted on 06/02/2006 1:19:55 PM PDT by akorahil (Thank You and God bless all Veterans. Truly, the real heroes.)
[ Post Reply | Private Reply | To 33 | View Replies]

To: cogitator
"and the climate change + increased volcanism theory is regaining lost ground."

You forgot to add "against all logic".

A global extinction of all critters bigger than a dog (except for the cold-blooded reptiles which could 'hibernate' through the global winter without having to eat for a year or more if necessary)is not going to be caused by "climate change" or "increased volcanism".

Actually, it was indeed caused by the temporary "catastrophic climate change" caused by the impact of the Yucatan asteroid (According to an Indian scientist, there may have been another simultaneous impact in Asia, presumably from the original object breaking up before impact, but that has not yet been proven as fact...)

47 posted on 06/02/2006 1:21:46 PM PDT by Al Simmons (Hillary Clinton is Stalin in a Dress)
[ Post Reply | Private Reply | To 27 | View Replies]

To: Glenn
Right. Our religious leaders have done so much to explain the observable.?

If religion did not exist at all, too many in the current crop of self-promoting doofuses, who call themselves "scientists", would make perfect fools of themselves without any help whatsoever, thankyouverymuch.

48 posted on 06/02/2006 1:25:20 PM PDT by Publius6961 (Multiculturalism is the white flag of a dying country)
[ Post Reply | Private Reply | To 40 | View Replies]

To: Mike Darancette
This impact was before there were dinosaurs.

I think he was referring to the other impact crater, Mike, Chicxulub...

49 posted on 06/02/2006 1:28:17 PM PDT by Publius6961 (Multiculturalism is the white flag of a dying country)
[ Post Reply | Private Reply | To 43 | View Replies]

To: kerryusama04
I didn't know that the "dinosaurs were killed by a meteor" theory had graduated to fact.

"They" say something enough times and it's fact. You know, like "Teddy is a congressman, Teddy is a congressman, Tedd...." --- oh, well.

50 posted on 06/02/2006 1:31:54 PM PDT by mtbopfuyn (I think the border is kind of an artificial barrier - San Antonio councilwoman Patti Radle)
[ Post Reply | Private Reply | To 21 | View Replies]


Navigation: use the links below to view more comments.
first 1-5051-100101-128 next last

Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.

Free Republic
Browse · Search
News/Activism
Topics · Post Article

FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson