Younger Dryas impact hypothesis

[Halb]

https://en.wikipedia.org/wiki/Younger_Dryas_impact...

The YOunger Dryas period created by a comet smashing into North America? What do people think about this theory?

[Eric Mc]

What's the evidence?

[Simpo Two]

Under the 'Evidence' section in the link.

[Eric Mc]

It wasn't there when I looked first. The article was a lot shorter.

[Halb]

The article hasn't been edited since the 7th.

The main solid evidence seems to be the nanodiamonds and microspherules across 50 odd sites. The platinum layer as well.

[Halb]

I'm currently reading a book that highlights the theory. It's been going since 2007 and is picking up steam.
The debate seems pretty vigorous.
There is also circumstantial evidence, like the floods that created the scablands in the American North-West.

[Eric Mc]

Maybe my computer didn't load the page properly. I assumed it was one of those "stubb" entries that you get in Wiki.

Looking at the "evidence" section, it does seem that there needs to be a lot more, and a lot more accurate, work done to determine if the theory has legs.

Ironically, the closer in geological time you get to the present, the smaller the time scales you need to attach events to.

An event that occurred 65 million years ago can be pinned down with an accuracy of a few hundred thousand years and still be reasonably valid.

If the event is claimed to have happened less than 20,000 years ago, then the accuracy would need to be within a few thousand years to stand up..

[Halb]

Eric Mc said:

If the event is claimed to have happened less than 20,000 years ago, then the accuracy would need to be within a few thousand years to stand up..

In my book, I'm sure they have got it down to 100 years. I may have to reread.

[Eric Mc]

At that level of detail they must be using radio carbon dating - which I didn't think could be as accurate as that.

[Halb]

The YDIT is touched upon in this podcast.
https://www.youtube.com/watch?v=aDejwCGdUV8

The biggest resistance coming from those who lean towards man-made issues.

[Moonhawk]

I do find it bizzare that we treat climate change as a bad thing to be avoided at all cost........whilst at the same time trying to protect the remnants of the last big climate change event (the last ice age) - classifying them as natural treasures, national parks and protected species.

[Halb]

YDT pops up in Rogan's chat, with famous sceptic, Shermer chatting with proponents Randall and Hancock.
https://www.youtube.com/watch?v=tFlAFo78xoQ

[XM5ER]

Halb said:

YDT pops up in Rogan's chat, with famous sceptic, Shermer chatting with proponents Randall and Hancock.
https://www.youtube.com/watch?v=tFlAFo78xoQ

I listened to that the other day as well. Shermer does come across as a complete ignorant berk to be honest, I was quite disappointed by his approach.

O/T I love Joe Rogan's podcasts, he has some really interesting folk on there and gives them the time to really go off the deep end as well.

[Halb]

Graham is back on the 22/4

https://www.sciencenews.org/article/greenland-impa...
"
But the crater — let’s call it that, for the sake of discussion — may have also reignited a debate over a controversial hypothesis about a mysterious cold snap known as the Younger Dryas. This cold period began abruptly about 12,800 years ago and ended just as abruptly about 11,700 years ago."

https://dailygalaxy.com/2019/03/the-day-the-earth-...

also...asteroid vent!!!
https://www.sciencealert.com/quelle-shock-asteroid...

[Art0ir]

I really don't like Graham Hancock. He pontificates like a prophet when it suits and retreats to "I'm just a journalist" when it suits him.

Randall Carson on the other hand (an actual geologist) is fascinating to listen to on Rogan's podcasts (and elsewhere).