Skip to comments.Comet May Have Collided With Earth 13,000 Years Ago(MEXICO)
Posted on 07/15/2012 5:03:34 PM PDT by ForGod'sSake
Central Mexicos Lake Cuitzeo contains melted rock formations and nanodiamonds that suggest a comet impacted Earth around 12,900 years ago, scientists say.
CREDIT: Israde et al. (2012)
New evidence supports the idea that a huge space rock collided with our planet about 13,000 years ago and broke up in Earth's atmosphere, a new study suggests.
This impact would have been powerful enough to melt the ground, and could have killed off many large mammals and humans. It may even have set off a period of unusual cold called the Younger Dryas that began at that time, researchers say.
The idea that Earth experienced an asteroid or comet impact at the start of the Younger Dryas has been controversial, in part because there is no smoking-gun impact crater left behind as with other known events in our planet's past. But researchers say it's common for space rocks to disintegrate in the heat of a planet's atmosphere before they can reach the ground.
The scientists first reported their suspicions about the event in 2007. Now, they say, a new site in Central Mexico's Lake Cuitzeo displays telltale signs of an impact, including melted rock formations called spherules and microscopic diamonds that could only have formed under extreme temperatures.
The researchers, led by Isabel Israde-Alcántara of Mexico's Universidad Michoacana de San Nicólas de Hidalgo, published their findings online March 5 in the journal Proceedings of the National Academy of Sciences.
"If you don't have a crater, you're a little bit lost," said space scientist Ted Bunch of Northern Arizona University, a member of the research team. "Here what we have is something similar to an aerial bomb blast. With these aerial bursts, with time all the evidence is wiped away unless it's buried." [Best Close Encounters of the Comet Kind]
In addition to the Mexican site, the scientists have found signs of an impact in Canada, the United States, Russia, Syria and various sites in Europe. And all of these bits of evidence were found buried in a thin layer of rock that dates to precisely 12,900 years ago.
"If you have an event like this in a 1- or 2-inch layer that dates to exactly the same age over a very large area, and you have high-temperature materials and nanodiamonds in there, the evidence pretty well points to an event that as pretty disastrous," Bunch told SPACE.com.
This wouldn't have been the only aerial impact event ever to hit Earth. Scientists think a space rock exploded over Siberia in 1908, flattening 500,000 acres (2,000 square kilometers) of forest in what's known as the Tunguska event.
If a comet, which would have been traveling at about 30 miles per second, impacted Earth's atmosphere, it would have created a flash of extreme heat reaching about 3,000 to 4,000 degrees Fahrenheit (1,600 to 2,200 degrees Celsius).
In addition to melting the ground, such temperatures would have proven cataclysmic to many kinds of life.
At the same time that the impact may have taken place 12,900 years ago Earth was beginning a mini ice age. It is known that many large animals, such as the mammoth and the saber-toothed cat, did not survive this age. There's even evidence of a population decline in humans living in North America at the time, called the Clovis culture.
The researchers aren't claiming that the comet impact caused the climate changes at the time, but Bunch said such an event would have had a significant effect on Earth's climate.
"We're not going to come out and say it did do it, but it's more than a coincidence that the timing happened exactly the time that a lot of climatic conditions occurred and you had the loss of various species," Bunch said.
Still, the researchers predict some skeptics will remain unconvinced that Earth was hit by space rock during the Younger Dryas.
"There's always going to be theoretical and statistical people who would never believe it even if they were there," Bunch said."I think what we're trying to do is open up a vista there for people to examine the data themselves and make their own conclusions."
Dr. Robert Schoch, who I find to be a fairly credible witness tends to believe massive solar storms from our sun may have been the culprit. I suppose both could have happened and been contributing factors. Me, I dunno...
First article I’ve run across implying possible multiple impacts leading to the Younger Dryas. I may have missed something though ;^)
Shades of Tugunska.....
Who is a dedicated gradualist these days?
Dayum you’re quick on the trigger!!!
It is an interesting article.
Even though it happened 12,900 years ago, it was still Bush’s fault.
From my observations, MOST of the Scientific Community still doggedly hangs onto their uniformitarian dogma; not unlike algore warming. Your mileage may vary...
I find it every bit as true as most Christians use the Bible to justify slavery.
George Bush’s fault.
The Chixalub impact doesn’t sound very gradual. However I’m among those who is leaning toward the theory that the dinosaurs were mostly gone by that bad day anyway.
Yes it is. I ran across it whilst looking for something altogether different. Happens a lot since I get easily sidetracked. :^)
Maybe my brain is waterlogged; I'm not following.
There was a time, not too long ago when all geologists believed in gradualism.
There was a time, not too long ago when slavery was justified by the Bible.
Now most scientists recognize that although most processes are gradual, game changers do happen. This is usually called "punctuated equilibrium".
Now most Bible believers use the Bible to excoriate slavery and racism. This is called. "Biblical Truth".
(Which oddly enough is exactly what they called it when it was being used to justify slavery)...
Since the "experts" can't even look back a few thousand years and reach anything approaching concensus, I don't hold out much hope going back several million.
Honestly it sounds to me like you’re looking for an argument but don’t really have a clue what you’re talking about.
If I didn’t know better I’d say you’re trying to hijack a perfectly good science thread.
Wasn't looking for anything actually but do tend to vent my spleen re the intransigence of MOST of the Scientific Community when the opportunity presents itself. So, sell me a clue.
“If a comet, which would have been traveling at about 30 miles per second, impacted Earth’s atmosphere, it would have created a flash of extreme heat reaching about 3,000 to 4,000 degrees Fahrenheit (1,600 to 2,200 degrees Celsius).”
I bet that’s how we got red hot chili peppers. Aiee! Carramba! (Sic)
Not to mention outgassing, mucho outgassing.
Odd. I was thinking the exact same thing about you.
Shall we call a truce pending a better venue?
Excellent, my sense of you is that we could have a good conversation and hopefully learn from each other. Looking forward to it.
Aww crap and a camper.
Lemme guess, you call out this guy when your toilet shocks you? As a matter of curiousity, does he have to have two licenses; in addition to his drivers license of course???
You’ll find I’m frequently wrong but never in doubt. ;^)
Perfect. I’m frequently right but always in doubt. ;^(
The Cycle of Cosmic Catastrophes:
Flood, Fire, and Famine
in the History of Civilization
by Richard Firestone,
Allen West, and
Thanks ForGod'sSake and BenLurkin!
|GGG managers are SunkenCiv, StayAt HomeMother & Ernest_at_the_Beach|
Thanks ForGod'sSake and BenLurkin!
I hadn’t seen anything about something that far south, either (that I recall) but having multiple parts of the same object arrive at slightly different times appears to be more common than the reverse. We should all wait to see about the dating of this new find — perhaps it happened earlier or later, like perhaps it’s dated the same as Berringer crater(still no solid, agreed-upon date for that impact).
There is no reason to think that the Earth had not taken as many hits proportionally as what we can see on the Moon. Yes our atmosphere is going to break up the asteroids more but it should be about the same.
Now that makes an impact. And how odd. It ended an ice age...
From a VERY long COMPANION ARTICLE it seems the group which includes Firestone, Kennett et al have settled on ~12,900 years ago. No mention of their dating method that I could find.
Now Berringer is a whole 'nother story. I haven't read anything anywhere(haven't really looked) about their dating method. Many moons ago???
Well done but eeewwww!!! I think null and void may be a guy.
Hung a few tags on it...
“A Defense of Virginia and the South”
SHEESH; I’m getting a headache!!! How’s about the Cliffs Notes version?
It is interesting that more and more evidence is piling up to support the hypothesis in Firestone et al.’s book. The article talks of the ice age ending at the time of the Younger Dryas which was then made worse. My understanding is the the ice age was ending around 15 to 18,000 years ago, and that this event/series of events triggered the Younger Dryas. Firestone’s book documents very widespread effects from Canada to our Southwest and even northwestern Europe. My vote would be for more than one impactor. After all, remember how many boloids struck Jupiter a few years ago.
The Carolina Bays are one such phenomenon possibly caused. My guess is that huge blocs of ice were thrown out, skidded to a stop and melted. Lake Michigan appears to have been formed by 2 or 3 impactors whose traces are found underwater. The Clovis culture was decimated as were large numbers of the great mammals.
The Tungusku event was small by comparison. A similar event occurred in the Brazilian jungle several decades later but was somewhat smaller in size. We are only beginning to appreciate the impact of boloid events on our earth and our history. Sunken Civ has brought to our attention the discover of a 2 mile crater in the drained Iraq Marshes whih fell about 4,000 years ago. Was this the cause of the First Intermediate Period in Egypt about that time? Ipuwer records a time of terrible social upheaval and distress in a papyrus. There are also fairly large meteor craters found in Argentina around the same period or perhaps a little earlier. So much to learn, so little time!! But first we have to use our open minds.
Again with the anti-Bible stuff.
Slavery, as mentioned/defined/used in the Bible is NOT the slavery we encountered here. It was more ‘indentured servant’ style. In no place does the Bible ‘endorse’ the practice of slavery, as we know it to be.
Context, especially historical, is everything.
I read several essays by Robert Schoch last night who, for whatever reasons I give some elevated credence to. Most everything I've read of his APPEARS an honest assessment, circumventing most of the PCBS, but that's just me. Anyhow, early on he leaned towards impactor(s) but he now leans more towards plasma discharges, from whatever source(s), primarily our sun. He tiptoed around Velikovsky's premise of a close flyby of say, Venus, by alluding to OTHER possible charged bodies. BTW, he doesn't eliminate impactors altogether and confesses there may have been more than one contributing factor. FWIW...