31-kilometer diameter crater in Greenland (potentially) dated to 10,800 BC impact event, caused mass extinction, kicked off the Younger Dryas

Theodoric

Ad Honorem
Mar 2012
2,953
Yötebory Sveriya
The current date suggestions are 2.588 million and 12,800 years ago coinciding with dates of known major impact events; this is the largest impact dated within the last 5 million years. So, for the record, we already know one DID occur by the residue layer, we don't know WHERE it happened and hadn't confirmed whether it is an asteroid or a volcano - but the evidence seems to indicate an impact event. This crater is consistent with what could have caused the event.

Massive Impact Crater Beneath Greenland Could Explain Ice Age Climate Swing - The Crux

For those unfamiliar with the Younger Dryas impact event, it burned approximately 10% of the Earth's surface and caused the extinction of most of Earth's megafauna, and the death of most of the rest. Africa was the only continent not to suffer a great deal. From 12,800 years ago until 11,550 years ago the Younger Dryas cooling period occurred, the end of the Pleistocene era (which began 2.588 million years ago). 12,800 years ago the temperature dropped approximately 15 degrees (Celcius) according to core tests on Greenland. At this time the forests of Scandinavia instantly vanished, replacing them with glacial ice.

12,500 BC - Natufian culture is harvesting wild cereal crops and living in settlements around the Levant. Woodlands are all over the Levant in this period.

10,800 BC - Younger Dryas Impact Event. Vegetation severely declined throughout the world. Woodlands collapse in the Levant and the Natufian settlements were abandoned around this time, and they regress to a nomadic lifestyle.

10,000 BC - A sudden rise in sea level occurs wiping out much of the coastal regions. Around this time the first evidence of early Farming occurs and the beginning of the Neolithic Revolution. Gobekli Tepe is constructed around this period in what is now Eastern Anatolia (in Turkey). Cave drawing culture occurs around this time as well. Jericho is also settled at this time.

9700-9550 BC - Sea levels rise again. Bering Strait crossing closes for the last time. The Younger Dryas period ends. Holocene period begins. Neolithic culture spreads throughout the Near East. The Towers of Tell Qaramel near Aleppo constructed, this site is about 250 kilometers from Gobekli Tepe.

To put it into context, shortly after the Younger Dryas occurred:

9000 BC - Stone structures built in Jericho around this time. Jericho exists at the same time as Gobekli Tepe.

8500 BC - Jericho established as the oldest known city.

~8000 BC - Walls of Jericho constructed around this time. Tower of Jericho also built. Gobekli Tepe abandoned and buried. Cultivation is occurring by this time.

By 7000 BC - Neolithic revolution begins occurring in China, Africa, and the Americas (very curiously, they farmed potatoes and squash as early as 8500 BC) around this time, the crops are different; also, this first African Neolithic culture appears to have vanished for hundreds of years before re-establishing in 6500 BC.

And it ALL may have occurred because of this meteor strike in Greenland. Or at least that is what the geologists WANT you to think. As far as I'm concerned, this is what happened about 12000 BC to end the Pleistocene era:

(PS. In case it's not clear, that last part is a silly joke. Anyone who plays video games, mainly RPGs, should get it!)
 
Mar 2018
848
UK
When you say "A sudden rise in sea level occurs", how sudden are we talking about? Months, years, decades or centuries? I really have a very poor grasp of scale for these things.
 

sparky

Ad Honorem
Jan 2017
5,208
Sydney
and sea rise is a notoriously difficult thing to measure since land tend to sink or rise depending on the local geology
 
Oct 2018
1,695
Sydney
My understanding was that megafauna died out at different times and under different conditions. For example, the loss of megafauna in North America has been linked to climate change, whereas the extinctions in Australia have been linked to the arrival of humans with fire.
 

sparky

Ad Honorem
Jan 2017
5,208
Sydney
Megafauna extinction is distressingly concurrent with human expansion , the only exception is Africa
 
Aug 2018
594
london
Ancient stone carvings confirm how comet struck Earth in 10,950BC, sparking the rise of civilisations
(The Telegraph, 21 April 2017)


"Ancient stone carvings confirm that a comet struck the Earth around 11,000BC, a devastating event which wiped out woolly mammoths and sparked the rise of civilisations.
Experts at the University of Edinburgh analysed mysterious symbols carved onto stone pillars at Gobekli Tepe in southern Turkey, to find out if they could be linked to constellations.
The markings suggest that a swarm of comet fragments hit Earth at the exact same time that a mini-ice age struck, changing the entire course of human history.

Scientists have speculated for decades that a comet could be behind the sudden fall in temperature during a period known as the Younger Dryas. But recently the theory appeared to have been debunked by new dating of meteor craters in North America where the comet is thought to have struck.

However, when engineers studied animal carvings made on a pillar – known as the vulture stone – at Gobekli Tepe they discovered that the creatures were actually astronomical symbols which represented constellations and the comet.

Using a computer programme to show where the constellations would have appeared above Turkey thousands of years ago, they were able to pinpoint the comet strike to 10,950BC, the exact time the Younger Dryas begins according to ice core data from Greenland.
The Younger Dryas is viewed as a crucial period for humanity, as it roughly coincides with the emergence of agriculture and the first Neolithic civilisations.

Before the strike, vast areas of wild wheat and barley had allowed nomadic hunters in the Middle East to establish permanent base camps. But the difficult climate conditions following the impact forced communities to come together and work out new ways of maintaining the crops, through watering and selective breeding. Thus farming began, allowing the rise of the first towns.

Edinburgh researchers said the carvings appear to have remained important to the people of Gobekli Tepe for millennia, suggesting that the event and cold climate that followed likely had a very serious impact.

Dr Martin Sweatman, of the University of Edinburgh’s School of Engineering, who led the research, said: "I think this research, along with the recent finding of a widespread platinum anomaly across the North American continent virtually seal the case in favour of (a Younger Dryas comet impact).

"Our work serves to reinforce that physical evidence. What is happening here is the process of paradigm change.

"It appears Göbekli Tepe was, among other things, an observatory for monitoring the night sky.

“One of its pillars seems to have served as a memorial to this devastating event – probably the worst day in history since the end of the ice age.”

Gobekli Tepe, is thought to be the world's oldest temple site, which dates from around 9,000BC, predating Stonehenge by around 6,000 years.

Researchers believe the images were intended as a record of the cataclysmic event, and that a further carving showing a headless man may indicate human disaster and extensive loss of life."


Ancient stone carvings confirm how comet struck Earth in 10,950BC, sparking the rise of civilisations
 
Aug 2018
594
london
"Cursed is the ground because of you;
through painful toil you will eat food from it
all the days of your life.
It will produce thorns and thistles for you,
and you will eat the plants of the field.
By the sweat of your brow
you will eat your food
until you return to the ground,
since from it you were taken;
for dust you are
and to dust you will return.”

So the Lord God banished him from the Garden of Eden to work the ground from which he had been taken.


Genesis 3 - New International Version (NIV) | Biblica
 

Theodoric

Ad Honorem
Mar 2012
2,953
Yötebory Sveriya
When you say "A sudden rise in sea level occurs", how sudden are we talking about? Months, years, decades or centuries? I really have a very poor grasp of scale for these things.
Sorry I didn't get back to earlier; and sorry if my answer is a little convoluted (since I just woke up, and it's about 2 hours too early), but as mentioned sea-level rising is a very difficult thing to measure or appreciate when given an average - which is about 4 cm per year globally, or 7.5m over 190 years (25 feet for English); but different areas will experience different effects and different amounts of flooding, desertification, and such. Admittedly, I am not the best person to really describe this - a geologist who specializes on the ice age would be a much better source.