Thanks DuncanWaring.
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Posted on 02/03/2018 4:13:39 PM PST by BenLurkin
....[A]t this time – roughly 12,800 years ago, according to a new study from the University of Kansas – that a comet struck our planet and triggered massive wildfires. This impact also triggered a short glacial period that temporarily reversed the previous period of warming, which had a drastic affect on wildlife and human development.
...
...[T]he team combined data from ice core, forest, pollen and other geochemical and isotopic markers obtained from more than 170 different sites across the world. Based on this data, the team concluded that roughly 12,800 years ago, a global disaster was triggered when a comet measuring about 100 km (62 mi) in diameter exploded in our atmosphere and rained fragments down on the surface.
“The hypothesis is that a large comet fragmented and the chunks impacted the Earth, causing this disaster. A number of different chemical signatures — carbon dioxide, nitrate, ammonia and others — all seem to indicate that an astonishing 10 percent of the Earth’s land surface, or about 10 million square kilometers, was consumed by fires.”
... As fires rushed across much of the planet’s landscape, the smoke and dust clogged the sky and blocked out sunlight. This triggered rapid cooling in the atmosphere, causing plants to die, food sources to dwindle, and ocean levels to drop. Last, but not least, the ice sheets which had been previously retreating began to advance again.
This quasi-ice age, according to the study, lasted about another thousand years. When the climate began to warm again, life began to recover, but was faced with a number of drastic changes. For example, fewer large animals survived, which affected the hunter-gather culture of humans all across North America. This was reflected in the different types of spear points that have been dated to this period.
...
(Excerpt) Read more at universetoday.com ...
PIF, you have a point but only because the paper was sorely misreported by Universe Today. From the very first sentence the actual paper maintains that we encountered a 100km comet that had been disintegrating for millennia before we crossed into a particularly lumpy and dangerous portion of the existing debris stream. The pre-existing fragments, large and small, impacted earth and exploded in the atmosphere. As you say, a 62 mile or 100km diameter object would hit the ground and ruin the earth completely before ever disintegrating in the atmosphere. As a (non-credentialed;) co-author of the papers, I have written to Universe and asked they correct this mistake. The same miscommunication on this point has dogged us for years. See the actual papers here on my blog, the Cosmic Tusk, and enjoy the incredible evidence behind our claims: https://cosmictusk.com/9483-2/
George A. Howard, Comet Research Group
Thank you very much for the clarification. This I can believe!
As an aside, when meteors explode in the atmosphere it is a function of stresses set up in the meteor by the intense heat on the surface and expansion on the outer layers and little expansion of the inner mass. This sets up tremendous stress in the stony meteors and they often explode. The iron-nickle ones simply ablate and if large enough make it to the surface. A 100k ice ball, rock or iron-nickle would arrive mostly intact and as said would be an extinction event. But it would be one hell of a fire works show for a few brief seconds. A lot of the fireworks would be very high intensity ultraviolet and cook you before impact.
Thanks again for the correction and you should rip a strip off the back of the editors at Universe Today. They served their publication poorly. I will read your article in its entirety.
Do you have any links regarding “another one mile rock hit which ended the Younger Dryas?” If the 62 mile body was mostly ice which fragmented in the upper atmosphere it could have caused the results suggested, and large chunks coming in at an angle cause the Carolina Bays. Another idea I had was that the CB’s were caused when the Canadian ice sheet was hit by a very large solid chunk and huge pieces of ice sheet were sent flying to Carolina. Their eliptical shapes point toward the north as indicated in the Firestone et al. book, supporting the direction of origin.
You last point: “... that the CB’s were caused when the Canadian ice sheet was hit by a very large solid chunk and huge pieces of ice sheet were sent flying to Carolina ...”
Look for this title: Carolina Bays - Evaluation of an impact hypothesis. There are several papers on this subject - that is just one I found quickly.
And from one of our own (baynut) at #61: https://cosmictusk.com/9483-2/
George A. Howard, Comet Research Group
As for the first point there are numerous sources with the corresponding documentation. One more complete sets of references to different ideas is found in Graham Hancock’s “Magicians of the Gods”. George might have more (I have not been there yet this AM), as he says in the paper (the posted article) he co-authored, it was reported incorrectly. The body that hit was part of the 100km comet, not the whole of it.
The Hancock book is primarily about what such an impact had on any existing human civilization. As you might be aware, the further back in time we trace our past, the murkier thing get, until we get to the Romans - here, while much is known, there is quite a lot about things which were central to them that we know almost nothing about - divination, oracles and so forth. Then there are the Chinese ...
Going further back, to the Old Kingdom Egyptians we have to learn to ignore logical thinking and think symbolically in order to get a glimpse of how they saw themselves and their world.
Going back even further is just near conjecture and guess work. And we are still thousands of years after the comet strike. When we get to the recently found site of Gobekli Tepe, the whole of human history known the year before had to be changed because this site dates from the time of the strike ... the oldest human civilization ever found. Which begs the question: where did they and their civilization originate?
Carolina In My Mind
James Taylor
In my mind I’m gone to Carolina
Can’t you see the sunshine?
Can’t you just feel the moonshine?
Ain’t it just like a friend of mine
To hit me from behind?
Yes, I’m gone to Carolina in my mind
Karin, she’s a silver sun
You best walk her way and watch it shine
And watch her watch the morning come
A silver tear appearing now
I’m cryin’, ain’t I?
Gone to Carolina in my mind
There ain’t no doubt in no ones mind
That love’s the finest thing around
Whisper something soft and kind
And hey babe, the sky’s on fire
I’m dying, ain’t I?
Gone to Carolina in my mind
In my mind I’m gone to Carolina
Can’t you see the sunshine?
Can’t you just feel the moonshine?
And, ain’t it just like a friend of mine
To hit me from behind?
Yes, I’m gone to Carolina in my mind
Dark and silent, late last night,
I think I might have heard the highway call
And geese in flight and dogs that bite
The signs that might be omens say
I’m goin’, I’m goin’
I’m gone to Carolina in my mind
With a holy host of others standin’ around me
Still I’m on the dark side of the moon
And it seems like it goes on like this forever
You must forgive me, if I’m up and gone to
Carolina in my mind
In my mind I’m goin’ to Carolina
Can’t you see the sunshine?
Can’t you just feel the moonshine?
Ain’t is just like a friend of mine
To hit me from behind
Yes, I’m gone to Carolina in my mind
Gone to Carolina in my mind
And I’m goin’ to Carolina in my mind
Goin’ to Carolina in my mind
Gone, I’m gone, I’m gone
Say nice things about me ‘cause I’m gone south now
Got to carry on without me, I’m gone
Songwriters: James Taylor / James V Taylor
Carolina In My Mind lyrics © Sony/ATV Music Publishing LLC
I think that's the general idea with this 62 mile wide body -- that because it is made of ice, it reaches its Roche point, shattering, and arriving more like a shotgun blast. That has almost nothing to do with the overall impact energy though. It could result in more atmospheric heating. What I'm getting at is, the size is way way off.
The idea in the book works best -- the Bays are more eliptical, indicating that they were formed by ejecta from a distant impact crater (in ice or what have you); and the authors point out the existence of the similar formations elsewhere in the circumference.
I’m surprised I had not run into the end Younger Dryas bolide strike info before. Some years ago I was very interested to read Graham Hancock’s ideas, especially the one that so much of developing civilization is likely to be underwater because our sea levels are basically end stage levels and don’t cover much of the history of human kind. A while ago I had the idea it might be fun to start a magazine (or now a web site, it was QUITE a while ago) titled “Journal of Undersea Exploration, Archaeology, and Adventure”. To be of interest to archaeologist and anthropologists, scuba divers, undersea explorers, etc. Would be financed by memberships and by advertisers and sellers of products like diving gear, boats, travel packages, etc. Oh, well, I am too old now, but maybe someone can use this idea. Pass it on.
I’m surprised I had not run into the end Younger Dryas bolide strike info before. Some years ago I was very interested to read Graham Hancock’s ideas, especially the one that so much of developing civilization is likely to be underwater ...”
read his “Magicians of the Gods” for more on the strike.
Around tea time.
Excellent to have you here! I have read your blog from time to time for a while now! Excellent work!
Red hot pieces of the comet would ignite the fires.l
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