Skip to comments.Asteroid may have killed dinosaurs quicker than scientists thought
Posted on 02/10/2013 5:50:15 PM PST by SunkenCiv
"The previous data that we had ... actually said that they (the tektites and the ash) were different in age, that they differed by about 180,000 years and that the extinction happened before the impact, which would totally preclude there being a causal relationship," said Renne, who studies ties between mass extinctions and volcanism.
He and colleagues were comparing a new technique to date geologic events when they realized there was a discrepancy in the timing -- the so-called 'K-T boundary' -- the geological span of time between the Cretaceous and Paleocene periods when the dinosaurs and most other life on Earth died out.
"I realized there was a lot of room for improvement. Even though many people had locked in their opinions that the impact and the extinctions were synchronous or not, they were basically ignoring the existing data," Renne said.
The study, published in Science, resolves existing uncertainty about the relative timing of the events, notes Heiko Plike of the Center for Marine Environmental Sciences at the University of Bremen, Germany.
Renne, for one... says ecosystems already were in a state of deterioration due to a major volcanic eruption in India when the asteroid struck... adding that the theory was speculative...
About 1 million years before the impact, Earth experienced six abrupt shifts in temperature of more than 2 degrees in continental mean annual temperatures, according to research cited by Renne and his co-authors.
The temperature swings include one shift of 6 to 8 degrees that happened about 100,000 years before the extinction.
(Excerpt) Read more at news.yahoo.com ...
Image courtesy of NASA shows an artist's concept of a broken-up asteroid. Scientists think that a giant asteroid, which broke up long ago in the main asteroid belt between Mars and Jupiter, eventually made its way to Earth and led to the extinction of the dinosaurs. REUTERS/NASA/JPL-Caltech/Handout
|GGG managers are SunkenCiv, StayAt HomeMother & Ernest_at_the_Beach|
Just adding to the catalog, not sending a general distribution.
In related news...
‘Record close’ asteroid may miss the Earth but it could take out your phone
I think the car was already wrapped around the tree with all occupants critical and the asteroid was the bullet to the head.
That’s what I call a close shave.
Did you not read your own link before posting it?
The 1st line of the article you conveniently snipped
Dinosaurs died off about 33,000 years after an asteroid hit the Earth, much sooner than scientists had believed, and the asteroid may not have been the sole cause of extinction, according to a study released Thursday.
And the 33K years is still dumb,
Is the Tunguska event that happened in 1908 going to be responsible for extinctions 32,982 years from now?
Life recovers quickly, Tunguska for instance, if you go there today, most of the evidence is long gone. Same would have happened with Chixalub, even if it was a meteor, if it didn't kill it out right, whatever survived would rebound and back to normal numbers within a decade or two.
Maybe the asteroid is a member of the Dollar Shave club!
Yes, of course I read the whole thing. The idea that volcanoes played a role was the quirky view of the one guy on the team who was interviewed, so naturally that came out. The volcano alibi (that’s my name for it) was developed to combat the Alvarez theory when it emerged over 30 years ago. The unreconstructed Darwinists have been fighting it tooth and nail. In fact, the earlier “study” that invented the 300K gap was from that very same camp.
Life recovers quickly when it can come in from unaffected areas. The KT event was worldwide in affect, and the lifeforms which wound up making it through into the Tertiary (there’s a clear-cut boundary, that’s why there are paleontological eras in the first place) were some sea life, and species which lived in burrows, and were mostly smaller (food supply and water supply was constrained, probably for years, perhaps for decades).
Life dies quickly, it doesn’t take 33,000 years.
There’s exactly zero evidence of that.
Please add me to the catastrophism ping list.
“Life dies quickly”
Not those stinking weeds growing in the cracks of my driveway. I could marinate the stupid things in weed killer, and they’d just say “Thanks for the bath.”.
Yale Scientists Discover the Last Living Dinosaur
CTV | Sat Jul. 16 2011
Posted on 07/16/2011 4:39:22 PM PDT by nickcarraway
Well, ya gotta figure, if they’re tough enough to start growing there in the first place...
Maybe diarrhea killed the dinos.
When Quinn the asteroid got there, all the dinosaurs crapped their pants.
Same would have happened with Chixalub, even if it was a meteor, if it didn’t kill it out right, whatever survived would rebound and back to normal numbers within a decade or two.
The geologic evidence argues against you.
It has taken decades, and it is still being studied, but when Toba erupted, it was as close to a wordless-catastrophe as we can imagine.
Temps globally plunged about ten degrees Celsius for almost a thousand years.
Can we trace extinctions to that event? Perhaps not yet.
But the point being that events that show up on the geological record are MASSIVELY more extreme than “Well, we had a rainy May” type news.
I can tell you have a PhD.
Explosive diarrhea caused by global warming? Simultaneously fascinating and disgusting!
I don't know why everyone is so interested in what killed the ....dinosaurs.
It's pretty obvious.
... I mean... oil comes from dinosaurs and ......
Seriously though, large scaly creatures ruled over the Earth for much, much longer than it is likely WE will. So far, they were a 1000 times more successful than we currently are. It's more of a mystery why they survived so long before extinction, considering that 99% of all species that have lived on this planet have gone extinct.
Mix Roundup Pro/Ranger Pro to 4oz/gal (grasses) with a Mechamine product (all other weeds) at 8oz/gal plus some form of spreader sticker and they will die.
Most off the shelf stuff is too weak and does not include a sticker to prevent the mixture from running off the leaves. The stickler will cause the mixture to dry in place within 15 minutes.
Best ever weed killer was Choridaine - 1/2 oz/gal killed everything for some years. Now banned as to deadly and too effective.
Thanks for the advice.
An Indian scientist, Chaterjee (sp?) has also postulated a huge crater off Mumbai, much larger than the one for Yucatan and possible cause of the Deccan Trappes.
It’s interesting that, well, let’s see, where’s that old topic...
NASA digital images discover ancient “Ramayana” bridge between India, Lanka
PTI | Washington, October 09 2002 | Editorial Staff
Posted on 10/09/2002 8:35:38 AM PDT by vannrox
Okay, it turns out there were a bunch of topics, but anyway, Bay of Bengal could be a crater, this bridge part of the rim. :’)
Well, they seem to be inching ever more closely to admitting Alvarez was right.
Opponents will slowly but surely die off.