A Massive Impact Crater Has Been Detected Beneath Greenland's Ice Sheet (gizmodo.com)
An anonymous reader quotes a report from Gizmodo: An unusually large asteroid crater measuring 19 miles wide has been discovered under a continental ice sheet in Greenland. Roughly the size of Paris, it's now among the 25 biggest asteroid craters on Earth. An iron-rich asteroid measuring nearly a kilometer wide (0.6 miles) struck Greenland's ice-covered surface at some point between 3 million and 12,000 years ago, according to a new study published today in Science Advances. The impact would've flung horrific amounts of water vapor and debris into the atmosphere, while sending torrents of meltwater into the North Atlantic -- events that likely triggered global cooling (a phenomenon sometimes referred to as a nuclear or volcanic winter). Over time, however, the gaping hole was obscured by a 1,000-meter-tall (3,200-foot) layer of ice, where it remained hidden for thousands of years. Remarkably, the crater was discovered quite by chance -- and it's now the first large crater to be discovered beneath a continental ice sheet.
That's quite the range of ages: two orders of magnitude. Not an impressive estimate.
Something not known to be there amazingly found by chance.
Isn't 12,000 --3,000,000 years a pretty big window?? Or is that par for the course?
- ------ Go 'til ya know.
It's quite possible that the asteroid caused the Ice Age and the Earth is just now getting out of it.
That's definitely something to ponder..
Scientific credibility is akin to dinosaurs not having feathers for the last 150 years of science and then *poof* magically being discovered to have had feathers.
Which to believe .... .... /. and will be nil better than hiring an extra few humans to do the work
- Science has proven today that....
- Over 100 years of science proves that....
- Our climate models prove that
- Lots of anecdotal bits and bytes prove that....
- 4 out of 5 dentists
- Polls show presidential candidate X leading by 2% with at 3% margin of error
- Congressional Budget Office projects a deficit of $500,000,000 over the next 10 years
- Technology X is everywhere in the news and will be the next big thing
- Applying big data, machine learning, AI to problem X will make it on the front page of
- Over the next 5 years...
- I promise to address traffic congestion by A, B, synchronize traffic lights and D....
- Bicycle lanes exist for cyclists (shhhh no, they exist because the federal government paid 50% of the cost for cities to re-stripe their streets)
- Red light cameras are about public safety and no, the red light camera ticket revenue is not going to be donated to victims of drunk driving
- Congressman X, newly elected, with a background in law, now on the Aviation Committee is an expert in aviation after 2 days on the committee...shhhhhh lets get the soundbite the newspaper agrees with and needs for the morning paper headline....
and millions more....
But I don't care. Who really cares? I sure as hell don't.
It was caused by aliens!
Hey I just realized slashdot is a toilet that just reposts widely disseminated news and adds a dumpster-fire comments section. Was it always like this and I never noticed?
You *just* realized this? That's pathetic.
Nobody is making you stay. You can show yourself out.
ZIP
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Shhh dont wake them up,
At 1km deep , lots of opportunity to sell off shards of genuine intergallactic rock.
Is Paris a unit of area now?
Are we talking the 105 km^2 inside the old city walls (plus east and west parks?),
or the 17,174 km^2 of present-day Paris?
https://en.m.wikipedia.org/wiki/Younger_Dryas_impact_hypothesis
In the crater, put it to work.
There is Paris, Tulsa the Paris of Oklahoma and now the Greenland Paris. How romantic!
Slashdot, fix the reply notifications... You won't get away with it...
I miss the days when "massive impact crater" would've had the trolls chomping at the bit to get a frosty piss goatse. This site has become such a shadow of its former self.
https://impact.ese.ic.ac.uk/Im...
So, you get a crater roughly the right size in that sort of rock if it is 2.5 km in diameter. You get 0.85 megatonnes equivalent energy, which is next to nothing. No significant global effect.
It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
So is this the impact that caused the Caroline Bays?
Yes, that is where Kim Kardashian landed in the 50's.
Area is always measured in Rhode Islands, volume in Olympic Sized Swimming Pools, Length in Football fields, ( = 10 school buses). Information in LoC (Library of Congress). BTW, length != distance. Distances are measured in Trips Around the Equator.
sed -e 's/Chuck Norris/Rajnikant/g' joke > fact
There has been a theory that the end of the last ice age was reversed temporarily, causing a re-glaciation and a dip in global temperatures around 12K years ago. So far no impact craters have been found. This might be the smoking gun, a big impact crater, that melted ice sheets, stopped the Atlantic conveyor system and produced shock crystals, etc. I would also link it to global flood stories (Noah, etc), but that may be pushing it.
Alternatively, when they finally dig down and analyse the crater floor, I hope they find Atlantis.
Large metallic meteor impact? Mine it. True fact: pretty much all the gold we mine got here by way of metallic meteor impact. Our own gold supplies having sunk deep into the core before the crust was formed. South Africa got its gold this way. Of course, the crater that did it for them is a bit bigger, just the lava dome in the middle is twice the diameter of this Greenland crater.
When all you have is a hammer, every problem starts to look like a thumb.
That's quite the range of ages: two orders of magnitude. Not an impressive estimate.
They just discovered the thing and it's buried under a huge amount ice. It's going to take a minute to find the evidence to more precisely pinpoint the impact date. Furthermore, when you are talking about geologic time, a million years is barely a blink of an eye.
From TFA:
“It is correct that the crater is not well dated but there’s good evidence that it is geologically young, that is, it formed within the last 2 to 3 million years, and most likely it is as young as the last Ice Age [which ended around 12,000 years ago],” Larsen explained to Gizmodo. “We are currently trying to come up with ideas on how to date the impact. One idea is to drill through the ice and get bedrock samples that can be used for numerical dating.”
Since a crater is a negative-space structure, for it to have mass means that the material that was blown out must have had negative mass. Ladies and gentlemen, we finally have it: anti-gravity has been discovered. Why isn't this the main headline?
I think if it was only 12,000 years ago, we'd have known about it.
It would be shocking if we knew anything about it. It's in a remote and barely inhabited part of the world, far from any sizeable human settlement at the time, thousands of years before there were any written records we know of outside of a few cave drawings.
Physical evidence, written evidence (it would be in the precursor texts to the old testament or something).
Physical evidence outside of the geologic record would be extremely sketchy. The oldest written records we have are from about 4-5000 years ago so there would be nothing reliable in even our oldest texts about an event that happened at least 7 thousand years before our earliest written records.
Australian Aborigines have an accurate oral history that goes back over 10,000 years.
They might have an oral history with some verifiable facts but you'd have to be pretty generous with your definition of "accurate" to use the word meaningfully. There might be some evidence in the information but it's deeply unlikely that any such stories passed down through that many generations survived without substantial alterations and errors. Not to mention that there is no means to go back and actually check what the stories originally said for most types of facts.
Oral histories and eyewitness testimony are terrible forms of evidence. Not to mention once religions get involved, objective evidence tends to go MIA almost immediately.
Isn't 12,000 --3,000,000 years a pretty big window?? Or is that par for the course?
The main reason for the wide window is just that they only recently discovered it and most of the geologic record needed to pin it down more accurately is buried under hundreds to thousands of feet of ice. It's going to take them a little time to gather the evidence and narrow the error bars.
OK, OT.
>_ Over time, however, the gaping hole was obscured by a 1,000-meter-tall (3,200-foot) layer of ice, where it remained hidden for thousands of years.
You know, some people might need the foot unit value to have an idea of the size of such a crater.
There was recently a discussion that English remains "the language of science" for the sheer number of texts written in it. Such things invalidate that remark (though in the present case there is fortunately an SI value).
First, let me start by asking: do you have different foot sizes in the USA? Because if you got different sizes, which one is the standard foot? And if you say "that's a totally different thing, don't mix two meanings of the word [foot]", I'd reply you're just making the issue worse. People from other countries immediately will think: "when is a foot not a foot?"
But the matter is not really only about using measurements based on variant human features -- and we might be thankful it's not about some other body part length!
Maybe the main problem is the unit itself. If it was called, say, "bai" (quasi-random mix of letters), a "bai" would still be a problem because of the constant need of conversion between it and the meter, or the need of conversion between it and miles or inches.
That is completely unscientific IMHO -- and also a source of problems in daily life.
Captcha: "ounces". This is why it's an uphill battle. It's not that the ideas aren't easy to grasp. It's stupid by design.
Too bad Slashdot doesn't do images (or maybe not, goatse and all). Looking at the map in the article the glacier perimeter actually follows the crater rim for about 40% of its circumference. The rim must be stabilizing the glacier right now.
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BIG TALK - Yet ZIP has nothing to show in programs. I can https://news.slashdot.org/comm... from registered /.ers liking/using/praising my work (& 100k users worldwide too). He can't.
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APK
P.S.=> KEEP IMPERSONATING ME CHIMP - this comes out every time, lol!... apk
You said it ZIP: Where's your work everyone can see/use? It's not. It's HOTAIRWARE/NOTWARE (lol) "I'm a much better programmer than APK" - by Anonymous Coward ZIP on Monday October 08, 2018 @11:27PM (#57449082) FROM https://yro.slashdot.org/comme...
The BETTER PROGRAMMER w/ no programs, lol - @ least you can say your "code" has NO BUGS - of course, it also does ZERO (like you) since it does nothing @ all, lol!
You hotair BLOWHARD talker, lol!
You f'd up ZIP https://tech.slashdot.org/comm...
Yet 100,000++ users of my ware & dozens of even REGISTERED /.ers like/use/praise MY work https://news.slashdot.org/comm... vs. your HOTAIR talk punk!
* LMAO!
(Let's see how YOU take it when I publicly SHIT ALL OVER YOU by letting FACTS of YOUR FUCKUPS vs. ME https://science.slashdot.org/c... do the job for me)
APK
P.S.=> You STUPID & LAZY all talk chimpanzee - KEEP IMPERSONATING me - I'll expose your BLOWHARD INCOMPETENCE publicly, lol... apk
i ish scientists would just say between 6000 and 3 million years ago just to satisfy both camps of science, but instead it is this anti-Gregorian bias towards carbon dating that doesnt help anyone since the concept of date is honoring a deity over it's known existance in comparison to inanimate objects.
Flat earthers and hollow earthers and religious tards are congruent to tge Mississippi River floodpan of 230 thousands years of recorded mud deposits which corresponds to the 8 immortals around China not to be contradescended to the 4 immortals that gave The Book of The Changes to Ghengis Khan which rototilled the supposed 11 to 16 arch-independent organic non-gmo implementations of man (plural mannen not the competing men ir humen).
between 3 million and 12,000 years ago..
APK
GO the fuck AWAY!
(Everybody chant along!)
APK
GO the fuck AWAY!
APK
GO the fuck AWAY!
APK
GO the fuck AWAY!