Case Closed? Comet Crash Killed Ice Age Beasts

Not Sure if this has been Posted as a Thread on ATS I search and found Nothing for a Thread ..
SO Mods Feel Free to end it if there is.. or Link this as a Add Onto the Discussion of the Subject .. Make it a Refresh Reboot..


As we wonder what the Cause of All the MEGA FAUNA Beast that Died to Extinction During the Last Ice Age
as in Siberian Tigers, Giant Sloths, Dire Wolfs, European Tigers and Wooly Mammoths.

Especially when you see Mammoths die in a Upright position with Food Still in their mouths and half digested and Frozen in a instant.. in the Permafrost of Siberia Russia. 12,000+ years ago... This has remained a Mystery for a long Long while ..

Reminds me of the Undertone of the Great Deluge ..

There may be an Answer ..

From Space.com back in 2012





Case Closed? Comet Crash Killed Ice Age Beasts
Megan Gannon, News Editor | September 19, 2012 03:18pm ET
www.space.com...

Interesting points

A space rock crashed into Earth about 12,900 years ago, wiping out some of North America's biggest beasts and ushering in a period of extreme cooling, researchers say, based on new evidence supporting this comet-crash scenario.

If such an impact took place, it did not leave behind any obvious clues like a crater. But microscopic melted rock formations called spherules and nano-size diamonds in ancient soil layers could be telltale signs of a big collision. The mix of particles could only have formed under extreme temperatures, created by a comet or asteroid impact.

Researchers first reported in 2007 that these particles were found at several archaeological sites in layers of sediment 12,900 years old. Now an independent study published in the Sept.17 issue of the Proceedings of the National Academy of Sciences (PNAS) says those findings hold up.

A team led by Malcolm LeCompte, of Elizabeth City State University in North Carolina, studied sediment samples from three sites in the Unites States: Blackwater Draw in New Mexico, Topper in South Carolina, and Paw Paw Cove in Maryland. The researchers said they found the same microscopic spherules in some of the same ancient layers as were found in the 2007 study.

A comet crash in the ice fields of eastern Canada could explain the region's die-off during the late Pleistocene epoch. While the cause of the catastrophic extinction event has been debated, researchers say it killed off three-fourths of North America's large ice-age animals, such as saber-toothed tigers and woolly mammoths, and the Clovis people, a Stone Age group that had only recently immigrated to the continent. [Album: 25 Amazing Ancient Beasts]

Now this Part is Interesting to Scholars of the Bible is it not ?

An impact also would explain what set off the Younger Dryas period or "Big Freeze," a 1,300-year era of glacial conditions that has been well documented in ocean cores and ancient soil samples. A comet would have produced enormous fires that melted large chunks of the North American ice sheet, sending cold water into the world's oceans and disrupting the circulation of currents responsible for global heat transport, the researchers noted.

ok Lets Back that up here.. Lets Repeat this ?

A comet would have produced enormous fires that melted large chunks of the North American ice sheet, sending cold water into the world's oceans and disrupting the circulation of currents responsible for global heat transport, the researchers noted

HMMM??? Causing disruption of the Currents > ? Say like a 600 Mile Asteroid that Broke apart into the Atmosphere of MARS ?

like what Happened to Mars as Some Scientist & researchers has Theorized ?

WE ALL heard the Stories of Mas extinction's every 12,000 to 36,000 years and also theorized 32 Million years

Could be a Possible >>... ( Conjunctive IDEA !!! ) Heavy Force Mass that Approaches the Ort Cloud projecting Asteroids to Comets in the Ice Fields in the Ort Cloud and Kuiper Belt ... every 12,000 to 36,000 years a Mass Object say like a Binary Star system .. ? Yet Nothing has Been Detected at all !!! of any Kind..

well ... ?

Getting WISE About Nemesis
By Leslie Mullen - Mar 11, 2010
- See more at: www.astrobio.net...



Evidence mounts for sun's companion star
Apr 24, 2006
phys.org...

Binary Companion Theory
www.binaryresearchinstitute.org...


How Many Stars are in the Solar System?

by Jerry Coffey on July 16, 2008

Read more: www.universetoday.com...

www.universetoday.com...

Just to be clear, there is no evidence of any kind that makes scholars think that there is a companion star in our Solar System. It is a theory based solely on a need to explain the periodic mass extinctions that our planet has experienced. So, the only answer to ‘how many stars are in the Solar System’ that can be proven through observation is one…the Sun. Read more: www.universetoday.com...

Extraterrestrial Life May be Common Around Binary Stars
Nola Taylor Redd, Astrobiology Magazine | February 26, 2013 01:03pm ET
www.space.com...


Well.. like Zeta Reticuli LOL... and we all know where leads too..

So the Mysterious Mass extinction still Lays of how..

There can be so Many Reasons of How and Why.. but I would Like to Focus on the More Logical Reasons.

So let Have a Discussion folks.. Idea's, Theory's, and Speculations.

just Remember what Happend in Jupiter in 1994 What if that Happened to be US ..

Comet Shoemaker–Levy 9
en.wikipedia.org...

The comet was later observed as a series of fragments ranging up to 2 km (1.2 mi) in diameter. These fragments collided with Jupiter's southern hemisphere between July 16 and July 22, 1994, at a speed of approximately 60 km/s (37 mi/s) or 216,000 km/h (134,000 mph). The prominent scars from the impacts were more easily visible than the Great Red Spot and persisted for many months

It is very possible and more than likely probable.

I use to buy into this theory, but my thoughts about it have somewhat changed.

Most supposed impact indicators at 29 sites are too old or too young to be remnants of an ancient comet that proponents claim sparked climate change at the end of the Ice Age, killed America’s earliest people and caused a mass animal extinction

blog.smu.edu... t-the-end-of-the-ice-age-or-killed-clovis-people/

a reply to: Wolfenz

What 12,000 to 36,000 year extinction cycle?

The only theorized cycle I remember reading about was something like every 26 million years.

.....

Yes, here it is:

Patterns in frequency

It has been suggested variously that extinction events occurred periodically, every 26 to 30 million years,[23] or that diversity fluctuates episodically every ~62 million years.

heres the new talking point... www.iflscience.com...

Great article. Quite some time ago The Way I See It and I discussed this quite a bit:

www.abovetopsecret.com...

From back in like 2009 or so. A summary of my position:

- a comet/meteor hit the ice shelf. The impact was absorbed by ice and left no crater. Conversely, it could have exploded just above the ice with a similar result, but provided the larger debris field more easily
- the downward force/pressure on the tectonic plates created geological stress, melted ice below the glaciers, and greatly fractured the ice
- huge amounts of water were released down the plains into the gulf, and off the east coast directly into the ocean
- the fresh, cold water disturbed the current and created eddies/whirlpools that made the seas violently tumultuous.
- the resulting floods left behind the "drumlin hills" we see in America
- fragments from the same event could be responsible for the Carolina Bays.

a reply to: bigfatfurrytexan

I've often wondered why the shores of my state (SC) and NC are shaped like that. It does look suggestive.

At 80 and 90 miles wide however, it would have needed to be something in the size of miles hitting.

The other problem is the lack of things like shocked quartz and other trace to show them as impact sites.

Still, better than what I thought as a kid (which was a gigantic hurricane sat off the coast and carved them out, hehehehe).

Well, we have newer science www.sciencedaily.com...

I don't think that we could ever know for sure what wiped out so much life. There are many theories, it is probably a combination of a few things. Maybe godzilla did it.

originally posted by: eriktheawful
a reply to: Wolfenz

What 12,000 to 36,000 year extinction cycle?

The only theorized cycle I remember reading about was something like every 26 million years.

.....

Yes, here it is:

Patterns in frequency

It has been suggested variously that extinction events occurred periodically, every 26 to 30 million years,[23] or that diversity fluctuates episodically every ~62 million years.

Extinction event
en.wikipedia.org...

Well ok you right on that

lesser extinction im guessing of the cycle i have poster about the 12 to 36 thousand years ago is also a pattern


for the mass 26 million to 200 million The MAJOR Events

and for the 200 million year mass extinction cycle this means close to a galactic year cycle ..

Wow according to Scientific American

Worst Mass Extinction Ever Took Only 60,000 Years
More than 90 percent of all life on Earth died off in a geologic blink during the Permian mass extinction, and scientists suspect multiple environmental factors were at play
www.scientificamerican.com...

a reply to: Wolfenz
Hi wolfenz,
This is one of the most contentious subjects in North American archeology and paleontology.
Here is the absolute latest work related to the field,

Ok,
I'm probably the only poster here who is really into this, but here is a paper on the Brady layer, a layer of carbon rich soil found in the US Midwest that dates to the younger dyras onset.

Most of the carbon (in the Brady soil) was fire derived or black carbon," notes Marin-Spiotta, whose team employed an array of new analytical methods, including spectroscopic and isotopic analyses, to parse the soil and its chemistry. "It looks like there was an incredible amount of fire."

If you notice in the photo the black carbon layer is very pronounced.
www.sciencedaily.com...

www.abovetopsecret.com...

originally posted by: eriktheawful
a reply to: bigfatfurrytexan

I've often wondered why the shores of my state (SC) and NC are shaped like that. It does look suggestive.

At 80 and 90 miles wide however, it would have needed to be something in the size of miles hitting.

The other problem is the lack of things like shocked quartz and other trace to show them as impact sites.

Still, better than what I thought as a kid (which was a gigantic hurricane sat off the coast and carved them out, hehehehe).

As i recall, part of the theory on the YD was that it exploded above the surface. This is due to the pressure it is creating in front of it (like a "bow shock' type of thing) increasing friction and stress.

I don't know a whole lot about meteors or anything. And what i read in 2009 has been largely forgotten.

a reply to: bigfatfurrytexan

If you haven't read Napier and Clubes work on the Taurid complex I highly reccomend it.
With the widespread distribution of impact derived materials, I think it's clear that the event was not a single large impact, but a series or swarm of impacts and airburst, over a period of time. The wide array of dates for some of the proxy materials at different sites has bee used as evidence that it didn't happen and that researchers are mistaken, but it does fit nicely with the earth repeatedly encountering the debris trail of a disintegrating comet.
The largest fragment impacted the laurentide ice sheet, and it did penetrate and leave a crater in lake superior. Interestingly enough, a new paper on the Carolina bays, postulates that they are craters from pieces of ice blasted out.
I don't think that the notion of a whole continent being vaporized is accurate, the area near the ice sheet impact yes, but most of the fires although initially started by the impacts or airbursts spread naturally through the very arid landscape.

New Study Suggests The World Is On The Brink Of The Next Great Extinction

May 31, 2014 | by Stephen Luntz

Read more at www.iflscience.com...
www.iflscience.com...

Estimating the number of current extinctions is hard enough, since some species disappear without us ever knowing they were there in the first place. It has been said we are having trouble even “counting the books while the library burns” . However, finding out what is normal is harder still. The fossil record preserves some species much better than others, and the fact that we can't find a species after a particular point may indicate it disappeared entirely, or just became a fair bit rarer. Read more at www.iflscience.com...

The world has experienced five mass extinctions over the last half a billion years. In each of these, most of the animal and plant species on the planet disappeared. The asteroid that wiped out the dinosaurs is of course the most famous. It wasn't, however, the most destructive mass extinction ever recorded. The Permian-Triassic extinction event occurred approximately 252 million years ago and wiped out an astonishing 96% of all marine species and 70% of all terrestrial vertebrate species. In between these major events there have been smaller spikes in the death rates, often driven by climatic changes. While we have already lost more species than in many of the more minor events, Pimm believes a combination of habitat protection, captive breeding and action on climate change can avoid a sixth mass extinction. Read more at www.iflscience.com...

Proc Natl Acad Sci U S A. Jan 1983; 80(2): 627–642.
PMCID: PMC393431
Experimental evidence that an asteroid impact led to the extinction of many species 65 million years ago

Full text Full text is available as a scanned copy of the original print version. Get a printable copy (PDF file) of the complete article (4.5M), or click on a page image below to browse page by page. Links to PubMed are also available for Selected References.

www.ncbi.nlm.nih.gov...

Complete TXT in PDF
www.ncbi.nlm.nih.gov...

originally posted by: punkinworks10
a reply to: Wolfenz
Hi wolfenz,
This is one of the most contentious subjects in North American archeology and paleontology.
Here is the absolute latest work related to the field,

Ok,
I'm probably the only poster here who is really into this, but here is a paper on the Brady layer, a layer of carbon rich soil found in the US Midwest that dates to the younger dyras onset.

Most of the carbon (in the Brady soil) was fire derived or black carbon," notes Marin-Spiotta, whose team employed an array of new analytical methods, including spectroscopic and isotopic analyses, to parse the soil and its chemistry. "It looks like there was an incredible amount of fire."

If you notice in the photo the black carbon layer is very pronounced.
www.sciencedaily.com...

www.abovetopsecret.com...

Yeah There Many Places around the Location

Known as Brady Soil, Marin-Spiotta and her colleagues studied the 15,000-year-old soil located in the Great Plains of Nebraska and Kansas. The research found that this particular soil went through dramatic changes during the time glaciers were melting in the Northern Hemisphere which sparked a shift in the climate. This change left an extreme amount of wildfire that resulted in the carbon being trapped in the soil. Read more at americanlivewire.com...

15,000-Year-Old Carbon-Rich 'Brady' Soil Contributes to Global Climate Change
IB TimesBy Lydia Smith | IB Times – Tue, May 27, 2014
uk.news.yahoo.com...

Such buried soils, according to researchers, are not unique to the Great Plains and occur worldwide. As humans increasingly disturb landscapes through a variety of activities, carbon becomes a potential contributor to climate change as it is reintroduced into the environment.

Sudden instinct Climate Change is a Real Killer.

rapid melting glaciers from an asteroid Meteor etc close to the size of Phobos ( estimate ) causing a sudden destruction like the Tunguska event,, but much greater causing disrupted Temperatures around the globe causing all Elements to go to their extremes ..

Tunguska event
en.wikipedia.org...


Hmm interesting !! A CLOSE ONE!! LOL didnt HAPPEN

Giant asteroid could hit Earth in 2014

Tuesday, September 2, 2003 Posted: 11:38 AM EDT (1538 GMT)
www.cnn.com...

What if !@ Such and Such >?

Considerable data and analysis support the detection of a supernova at a distance of about 50 pc, ~2.6 million years ago. This is possibly related to the extinction event around that time and is a member of a series of explosions which formed the Local Bubble in the interstellar medium.

We build on the assumptions made in previous work, and propagate the muon flux from supernova-initiated cosmic rays from the surface to the depths of the ocean. We find that the radiation dose from the muons will exceed the total present surface dose from all sources at depths up to a kilometer and will persist for at least the lifetime of marine megafauna. It is reasonable to hypothesize that this increase in radiation load may have contributed to a newly documented marine megafaunal extinction at that time.

Astrobiology.com, Jan. 2, 2018 - Muon Radiation Dose and Marine Megafaunal Extinction at the end-Pliocene Supernova.

Full paper at arXiv.org (pdf): Muon Radiation Dose and Marine Megafaunal Extinction at the end-Pliocene Supernova.

I was wandering around the interweb, bored, and my computer slowed to a crawl. I logged out of here, was closing all browsers when this page finally opened! Glad I read it before closing it completely. I was going to reboot when everything sped back up... so have to share!

50 parsecs is about 160 light years away. That seems pretty close for something to supernova. The persistence of cosmic rays down to a kilometer is pretty scary. The fact some bison survived up north might be a clue as to when the event hit earth's surface (late fall/early winter).

The time does not align with the 12,000 years ago @OP but is a significant find to explain at least part of a great extinction event.

a reply to: TEOTWAWKIAIFF

Teot,
That's rad,

And very interesting,

After reading your link, I did a little research of my own and found this regarding the late pliocene extinction.
Marine Megafaunal Extinction

The end of the Pliocene marked the beginning of a period of great climatic variability and sea-level oscillations. Here, based on a new analysis of the fossil record, we identify a previously unrecognized extinction event among marine megafauna (mammals, seabirds, turtles and sharks) during this time, with extinction rates three times higher than in the rest of the Cenozoic, and with 36% of Pliocene genera failing to survive into the Pleistocene.

and

The Pliocene marine megafauna extinction and its impact on functional diversity


The Pliocene marine megafauna extinction and its impact on functional diversity

The end of the Pliocene marked the beginning of a period of great climatic variability and sea-level oscillations. Here, based on a new analysis of the fossil record, we identify a previously unrecognized extinction event among marine megafauna (mammals, seabirds, turtles and sharks) during this time, with extinction rates three times higher than in the rest of the Cenozoic, and with 36% of Pliocene genera failing to survive into the Pleistocene.

The origination of new genera during the Pleistocene created new functional entities and contributed to a functional shift of 21%, but minimally compensated for the functional space lost. Reconstructions show that from the late Pliocene onwards, the global area of the neritic zone significantly diminished and exhibited amplified fluctuations. We hypothesize that the abrupt loss of productive coastal habitats, potentially acting alongside oceanographic alterations, was a key extinction driver. The importance of area loss is supported by model analyses showing that animals with high energy requirements (homeotherms) were more susceptible to extinction. The extinction event we uncover here demonstrates that marine megafauna were more vulnerable to global environmental changes in the recent geological past than previously thought.

So, the paleontologists say that there was an abrupt loss of coastal habitat, and that it seems the food chain collapsed, in repsonse to climatological changes.
The physicists say that the particle flux was strong enough to penetrate 1km deep.
What kind of effects to the environment can account for such dramatic responses in a particular eco system?

Thanks for bringing the particle physics to the past

Wouldn't it have been classified an asteroid instead of a comet?

a reply to: punkinworks10

It sounds so... biblical! "A third of all animals living in sea shall die..." (36%)!!

Mother nature is pretty resilient, huh? To bounce back from extinction events six times. Asteroid impacts, jumping from non-oxygen to an oxygen atmosphere, cosmic rays from a near by supernova, even the man made pollution we are creating right now,... the planet has survived even if the creatures on the surface or in the sea did not.

I was looking for more stories on using muon radiation to map ancient temples like when they found that gap in the Great Pyramid! I saw this story and was kind of amazed how we can piece particle physics from space to effects here on earth to explain what had been overlooked. Yeah, that is pretty rad!

With Betelgeuse about ready to blow, it makes you wonder.

PS - Betelgeuse is 642.5 light years away.

The impact was absorbed by ice and left no crater.

There was a crater but since the ice where it hit was likely 2 miles thick there was no ground crater as the ice absorbed the impact.