[HN Gopher] Evidence of a 12,800-year-old shallow airburst depre...
___________________________________________________________________
Evidence of a 12,800-year-old shallow airburst depression in
Louisiana
Author : keepamovin
Score : 71 points
Date : 2025-07-01 07:55 UTC (1 days ago)
(HTM) web link (www.scienceopen.com)
(TXT) w3m dump (www.scienceopen.com)
| readthenotes1 wrote:
| Buried the lede:
|
| "Son claims Dad was right all along"
| tigereyeTO wrote:
| Interesting. There's a hypothesis that Earth was struck by an
| impact 12,800 years ago in North America but the impact site
| wasn't identified
|
| https://en.m.wikipedia.org/wiki/Younger_Dryas_impact_hypothe...
|
| Could these be related?
| qualeed wrote:
| I hadn't heard of this, but it says:
|
| > _The hypothesis is widely rejected by relevant
| experts.[2][1][3][4] It is influenced by creationism [...] It
| is an alternative to the long-standing and widely accepted
| explanation that the Younger Dryas was caused by a significant
| reduction in, or shutdown of the North Atlantic Conveyor due to
| a sudden influx of freshwater from Lake Agassiz and
| deglaciation in North America. [...] Authors have not yet
| responded to requests for clarification and have never made
| their raw data available_
|
| Is there a reason why the widely accepted explanation isn't
| satisfactory?
| tigereyeTO wrote:
| The publication of this research.
|
| One possibility discussed in the publication is that the
| sudden influx of freshwater from Lake Agassiz was _caused_ by
| the Perkins Louisiana impact.
| cluckindan wrote:
| It happened at the end of an ice age, when mile-thick
| glaciers were melting away. That's a lot of fresh water
| going to the oceans.
| deepdarkforest wrote:
| If you actually click on the link, it mentions this both in the
| abstract, and a detailed comparison of evidence in a whole
| table.
| 8bitsrule wrote:
| The evidence for multiple strikes around 12,800BP has been
| piling up for quite a few years now. There are other theories
| of course. A few papers :
|
| Alaska - https://dx.doi.org/10.1086/695703
|
| South Carolina - www.nature.com/articles/s41598-019-51552-8
| (plus Article: https://theconversation.com/new-evidence-that-
| an-extraterres... )
|
| Chile - https://www.nature.com/articles/s41598-018-38089-y
|
| South Africa -
| https://dx.doi.org/10.1016/j.quascirev.2014.06.017
|
| Syria - https://dx.doi.org/10.1038/s41598-020-60867-w
|
| California, Channel Islands -
| https://dx.doi.org/10.1016/j.quascirev.2008.09.006
| jonathaneunice wrote:
| Zero expertise in any of the related disciplines to interpret or
| judge any of this, but I can say with confidence that the related
| Wikipedia page
| https://en.wikipedia.org/wiki/Younger_Dryas_impact_hypothesi...
| is a _wild_ read and outright flamethrower at everything about
| Younger Dryas and seemingly, everyone involved.
| farceSpherule wrote:
| The Younger Dryas debate spans climatology, archaeology,
| geology, and astrophysics, creating tension across multiple
| disciplines.
|
| There is scientific evidence that the Younger Dryas event
| occurred, however, no universally accepted scientific study
| that conclusively proves WHAT caused it.
| cluckindan wrote:
| The Younger Dryas was not an "event", it was a period in
| Earth's geologic history that occurred circa 12,900 to 11,700
| years Before Present (BP).
| xeromal wrote:
| Is the 0 point for Before Present a different year than the
| Jesus year? I've never heard it used before.
| Neekerer wrote:
| It's actually 1950
| https://en.m.wikipedia.org/wiki/Before_Present?hl=en-US
| xeromal wrote:
| Thank you!
| AlotOfReading wrote:
| Ish. It's technically correct for BP and radioisotope
| dating specifically, but other dating methods don't use
| the same scale like TL. You'll commonly see kiloanni (ka)
| used instead and that may or may not be referenced to
| 1950 depending on the whims of the author.
| IncreasePosts wrote:
| That's right around the time the "modern" era ended and
| "post-modern" began. Funny we've been making these errors
| since basically the beginning of time. Looking at you,
| New Bridge, the oldest bridge in Paris!
| FrustratedMonky wrote:
| Kind of pedantic?
|
| I think everyone knows the debate is around the 'event',
| which caused a 'period' of geologic history which is
| referred to as "Younger Dryas". I guess once the 'event' is
| known, it can be named something, like "The Younger Dryas
| Event".
|
| What I'd like to know, is why just one event. There is this
| paper, and also the crater found in Greenland a couple
| years ago. Maybe there was a more general bombardment, not
| just a one-off smoking gone.
| protocolture wrote:
| There doesnt have to be an event.
|
| The current accepted theory is (from the gps wiki
| article)
|
| "is an alternative to the long-standing and widely
| accepted explanation that the Younger Dryas was caused by
| a significant reduction in, or shutdown of the North
| Atlantic Conveyor due to a sudden influx of freshwater
| from Lake Agassiz and deglaciation in North America."
| MichaelZuo wrote:
| Is it plausible for such a large airburst as hypothesized to
| leave behind such a small crater?
| btilly wrote:
| Yes. If it exploded in the air, then there is no crater.
| gattr wrote:
| Indeed, cf. Tunguska event ([1]) from 1908.
|
| [1] https://en.wikipedia.org/wiki/Tunguska_event
| protocolture wrote:
| Look a lot of this passes the sniff test but anything Younger
| Dryas related I have to assume based on past performance is all
| buillshit designed to prop up religious fundamentalists and bodgy
| history.
| esseph wrote:
| ???
|
| There's no link to anything religion wise with the Younger
| Dryas AFAIK.
| blueflow wrote:
| How is this supposed to work with the sedimentation? The glass
| spherules under the lake are maxxing out 5-6 meters below the
| surface. Where does the material on top of that come from, and
| why didn't it fill in the lake, but leave it intact & with
| ridges?
|
| Second, if you think of an impact at an angle, the crater and its
| ridges form an ellipse. If its coming very flat, the structures
| might look rather parabolic, but still bent inwards. In the
| article, the north ridge is bent _outwards_. How? Questions over
| questions.
___________________________________________________________________
(page generated 2025-07-02 23:00 UTC)