>>Roughly 12,800 years ago, planet Earth went through a brief cold snap that was unrelated to any ice age. For years, there have been geologists that have argued that this period was caused by an airburst or meteor fragments (known as the Younger Dryas Impact Theory). This event is beleived to have caused widespread destruction and the demise of the Clovis culture in North American.

This theory has remained controversial since it was first proposed. However, an international team of scientists recently discovered geological evidence in South America that could settle the debate. As the latest indication of an impact that took place during the Younger Dryas Boundary (YDB) period, this crater indicates that the effects of this event may have been more widespread than previously thought.<<

https://www.universetoday.com/141804/almost-13000-years-ago-a-comet-impact-set-everything-on-fire/

Might help explain why frozen Mammoths have been discovered that have died very suddenly, some still eating herbage.

PermeateFree said:

>>Roughly 12,800 years ago, planet Earth went through a brief cold snap that was unrelated to any ice age. For years, there have been geologists that have argued that this period was caused by an airburst or meteor fragments (known as the Younger Dryas Impact Theory). This event is beleived to have caused widespread destruction and the demise of the Clovis culture in North American.

This theory has remained controversial since it was first proposed. However, an international team of scientists recently discovered geological evidence in South America that could settle the debate. As the latest indication of an impact that took place during the Younger Dryas Boundary (YDB) period, this crater indicates that the effects of this event may have been more widespread than previously thought.<<

https://www.universetoday.com/141804/almost-13000-years-ago-a-comet-impact-set-everything-on-fire/

Might help explain why frozen Mammoths have been discovered that have died very suddenly, some still eating herbage.

The Younger Dryas is a major mystery. For an introduction, see wikipedia “https://en.wikipedia.org/wiki/Younger_Dryas”.

The end of the Younger Dryas is consistently given as 11550 years ago give or take 50 years, from places as far apart as Greenland, Norway, Venezuela and Germany.

But the article in the OP is about the start of the Younger Dryas. There is disagreement about whether it started suddenly (impact hypothesis) or gradually (13,000 years ago at latitude 55 North, 12,700 years ago further north) from Muschitiello et al (2015).

“In Western Europe and Greenland, the Younger Dryas is a well-defined synchronous cool period. Cooling in the tropical North Atlantic may, however, have preceded it by a few hundred years; South America shows a less well-defined initiation but a sharp termination. The Antarctic Cold Reversal appears to have started a thousand years before the Younger Dryas and has no clearly defined start or end; There is a fair confidence in the absence of the Younger Dryas in Antarctica, New Zealand and parts of Oceania. Timing of the tropical counterpart to the Younger Dryas, the Deglaciation Climate Reversal (DCR), is difficult to establish.”

Origin hypotheses:

• Shutdown of the Gulf stream due to ice age meltwater – geological evidence is lacking
• Solar flare – doesn’t explain the worldwide spread
• Impact hypothesis
• Volcano eruption in Germany – looking good
• Vela supernova

mollwollfumble said:

PermeateFree said:

>>Roughly 12,800 years ago, planet Earth went through a brief cold snap that was unrelated to any ice age. For years, there have been geologists that have argued that this period was caused by an airburst or meteor fragments (known as the Younger Dryas Impact Theory). This event is beleived to have caused widespread destruction and the demise of the Clovis culture in North American.

This theory has remained controversial since it was first proposed. However, an international team of scientists recently discovered geological evidence in South America that could settle the debate. As the latest indication of an impact that took place during the Younger Dryas Boundary (YDB) period, this crater indicates that the effects of this event may have been more widespread than previously thought.<<

https://www.universetoday.com/141804/almost-13000-years-ago-a-comet-impact-set-everything-on-fire/

Might help explain why frozen Mammoths have been discovered that have died very suddenly, some still eating herbage.

The Younger Dryas is a major mystery. For an introduction, see wikipedia “https://en.wikipedia.org/wiki/Younger_Dryas”.

The end of the Younger Dryas is consistently given as 11550 years ago give or take 50 years, from places as far apart as Greenland, Norway, Venezuela and Germany.

But the article in the OP is about the start of the Younger Dryas. There is disagreement about whether it started suddenly (impact hypothesis) or gradually (13,000 years ago at latitude 55 North, 12,700 years ago further north) from Muschitiello et al (2015).

“In Western Europe and Greenland, the Younger Dryas is a well-defined synchronous cool period. Cooling in the tropical North Atlantic may, however, have preceded it by a few hundred years; South America shows a less well-defined initiation but a sharp termination. The Antarctic Cold Reversal appears to have started a thousand years before the Younger Dryas and has no clearly defined start or end; There is a fair confidence in the absence of the Younger Dryas in Antarctica, New Zealand and parts of Oceania. Timing of the tropical counterpart to the Younger Dryas, the Deglaciation Climate Reversal (DCR), is difficult to establish.”

Origin hypotheses:

• Shutdown of the Gulf stream due to ice age meltwater – geological evidence is lacking
• Solar flare – doesn’t explain the worldwide spread
• Impact hypothesis
• Volcano eruption in Germany – looking good
• Vela supernova
  

With two impact craters at this time, 12,800 years ago. One in Greenland and one in Argentina. And a volcanic eruption in Germany. Together with a shut-down of the Gulf Stream. It makes one glad that one lives in Australia, doesn’t it.

On the other hand, there are rift valleys all along the mid-ocean ridges, and not a sign of volcanism there except in Iceland. I wonder when the last mid-ocean ridge eruption was – it ought to have been more severe than any plate boundary eruption because we have small plate boundary eruptions all the time.

I also wonder about the more ancient Pacific resurfacing eruption event.

mollwollfumble said:

mollwollfumble said:

PermeateFree said:

>>Roughly 12,800 years ago, planet Earth went through a brief cold snap that was unrelated to any ice age. For years, there have been geologists that have argued that this period was caused by an airburst or meteor fragments (known as the Younger Dryas Impact Theory). This event is beleived to have caused widespread destruction and the demise of the Clovis culture in North American.

This theory has remained controversial since it was first proposed. However, an international team of scientists recently discovered geological evidence in South America that could settle the debate. As the latest indication of an impact that took place during the Younger Dryas Boundary (YDB) period, this crater indicates that the effects of this event may have been more widespread than previously thought.<<

https://www.universetoday.com/141804/almost-13000-years-ago-a-comet-impact-set-everything-on-fire/

Might help explain why frozen Mammoths have been discovered that have died very suddenly, some still eating herbage.

The Younger Dryas is a major mystery. For an introduction, see wikipedia “https://en.wikipedia.org/wiki/Younger_Dryas”.

The end of the Younger Dryas is consistently given as 11550 years ago give or take 50 years, from places as far apart as Greenland, Norway, Venezuela and Germany.

But the article in the OP is about the start of the Younger Dryas. There is disagreement about whether it started suddenly (impact hypothesis) or gradually (13,000 years ago at latitude 55 North, 12,700 years ago further north) from Muschitiello et al (2015).

“In Western Europe and Greenland, the Younger Dryas is a well-defined synchronous cool period. Cooling in the tropical North Atlantic may, however, have preceded it by a few hundred years; South America shows a less well-defined initiation but a sharp termination. The Antarctic Cold Reversal appears to have started a thousand years before the Younger Dryas and has no clearly defined start or end; There is a fair confidence in the absence of the Younger Dryas in Antarctica, New Zealand and parts of Oceania. Timing of the tropical counterpart to the Younger Dryas, the Deglaciation Climate Reversal (DCR), is difficult to establish.”

Origin hypotheses:

• Shutdown of the Gulf stream due to ice age meltwater – geological evidence is lacking
• Solar flare – doesn’t explain the worldwide spread
• Impact hypothesis
• Volcano eruption in Germany – looking good
• Vela supernova
  

With two impact craters at this time, 12,800 years ago. One in Greenland and one in Argentina. And a volcanic eruption in Germany. Together with a shut-down of the Gulf Stream. It makes one glad that one lives in Australia, doesn’t it.

On the other hand, there are rift valleys all along the mid-ocean ridges, and not a sign of volcanism there except in Iceland. I wonder when the last mid-ocean ridge eruption was – it ought to have been more severe than any plate boundary eruption because we have small plate boundary eruptions all the time.

I also wonder about the more ancient Pacific resurfacing eruption event.

I think this new theory add considerably to likely habitat destruction, which would have had a profound influence on the diversity of life on this plant. It answers many problems regarding previous theories and should not be cast aside as is the wont of some here. This is an important and relevant theory considering the circumstances and should be read by those interested in earth’s history and in particular the loss of wildlife, especially the megafauna of this period,

PermeateFree said:

mollwollfumble said:

mollwollfumble said:

The Younger Dryas is a major mystery. For an introduction, see wikipedia “https://en.wikipedia.org/wiki/Younger_Dryas”.

The end of the Younger Dryas is consistently given as 11550 years ago give or take 50 years, from places as far apart as Greenland, Norway, Venezuela and Germany.

But the article in the OP is about the start of the Younger Dryas. There is disagreement about whether it started suddenly (impact hypothesis) or gradually (13,000 years ago at latitude 55 North, 12,700 years ago further north) from Muschitiello et al (2015).

“In Western Europe and Greenland, the Younger Dryas is a well-defined synchronous cool period. Cooling in the tropical North Atlantic may, however, have preceded it by a few hundred years; South America shows a less well-defined initiation but a sharp termination. The Antarctic Cold Reversal appears to have started a thousand years before the Younger Dryas and has no clearly defined start or end; There is a fair confidence in the absence of the Younger Dryas in Antarctica, New Zealand and parts of Oceania. Timing of the tropical counterpart to the Younger Dryas, the Deglaciation Climate Reversal (DCR), is difficult to establish.”

Origin hypotheses:

• Shutdown of the Gulf stream due to ice age meltwater – geological evidence is lacking
• Solar flare – doesn’t explain the worldwide spread
• Impact hypothesis
• Volcano eruption in Germany – looking good
• Vela supernova
  

With two impact craters at this time, 12,800 years ago. One in Greenland and one in Argentina. And a volcanic eruption in Germany. Together with a shut-down of the Gulf Stream. It makes one glad that one lives in Australia, doesn’t it.

On the other hand, there are rift valleys all along the mid-ocean ridges, and not a sign of volcanism there except in Iceland. I wonder when the last mid-ocean ridge eruption was – it ought to have been more severe than any plate boundary eruption because we have small plate boundary eruptions all the time.

I also wonder about the more ancient Pacific resurfacing eruption event.

I think this new theory add considerably to likely habitat destruction, which would have had a profound influence on the diversity of life on this plant. It answers many problems regarding previous theories and should not be cast aside as is the wont of some here. This is an important and relevant theory considering the circumstances and should be read by those interested in earth’s history and in particular the loss of wildlife, especially the megafauna of this period,

plant = planet

University of California Santa Barbara’s news article, which is quite well written.

https://www.news.ucsb.edu/2019/019375/day-world-burned

Original peer reviewed article in Nature. Long, but detailed.

https://www.nature.com/articles/s41598-018-38089-y

Michael V said:

University of California Santa Barbara’s news article, which is quite well written.

https://www.news.ucsb.edu/2019/019375/day-world-burned

Original peer reviewed article in Nature. Long, but detailed.

https://www.nature.com/articles/s41598-018-38089-y

Thanks MV, the above place the importance of this event where it belongs and not as a wanton cast-off of an unimportant theory.

PermeateFree said:

Michael V said:

University of California Santa Barbara’s news article, which is quite well written.

https://www.news.ucsb.edu/2019/019375/day-world-burned

Original peer reviewed article in Nature. Long, but detailed.

https://www.nature.com/articles/s41598-018-38089-y

Thanks MV, the above place the importance of this event where it belongs and not as a wanton cast-off of an unimportant theory.

No worries.

The Nature article in it’s entirety is a compelling, well written and well argued piece with good supporting evidence. Where there’s doubt, or insufficient evidence to wholly support them, they say so. The conclusions drawn are likely valid.

It’s certainly a very interesting and well documented idea.

Michael V said:

PermeateFree said:

Michael V said:

University of California Santa Barbara’s news article, which is quite well written.

https://www.news.ucsb.edu/2019/019375/day-world-burned

Original peer reviewed article in Nature. Long, but detailed.

https://www.nature.com/articles/s41598-018-38089-y

Thanks MV, the above place the importance of this event where it belongs and not as a wanton cast-off of an unimportant theory.

No worries.

The Nature article in it’s entirety is a compelling, well written and well argued piece with good supporting evidence. Where there’s doubt, or insufficient evidence to wholly support them, they say so. The conclusions drawn are likely valid.

It’s certainly a very interesting and well documented idea.

Very interesting read. Dense for the non geologist, but manageable. A few interesting words I don’t know, but could get from the context. And I had to remember all the chemical symbols. But thank you, this stuff is definitely interesting.

http://vizivtechnologies.com/technology/

one for sibeen.

ChrispenEvan said:

http://vizivtechnologies.com/technology/

one for sibeen.

Bugger I wanted to see that too.
kicks dirt

ChrispenEvan said:

http://vizivtechnologies.com/technology/

one for sibeen.

If we use one of Rossi’s E-Cat generators we’ll have free energy that can be transported anywhere.

Peak Warming Man said:

ChrispenEvan said:

http://vizivtechnologies.com/technology/

one for sibeen.

Bugger I wanted to see that too.
kicks dirt

nobody is checking at the gate, just walk in confidently like you own the place.

Peak Warming Man said:

ChrispenEvan said:

http://vizivtechnologies.com/technology/

one for sibeen.

Bugger I wanted to see that too.
kicks dirt

Seems we are all om=n the bottom rung.