bolide impact and younger dryas and wildfires

Discussion in 'Earth Science' started by sculptor, Dec 31, 2018.

  1. sculptor Valued Senior Member

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    5,572
    It seems most likely that there was a bolide impact(or several) circa 12-13kybp which triggered the younger dryas cold snap.
    It also seems most likely that this impact set off raging wildfires that may have consumed over 10 percent of the world's biomass.
    This seems to have been followed by a multi year winter.
    And may have caused the extinction of the megafauna and the die0off of the north american humans.

    https://www.journals.uchicago.edu/doi/abs/10.1086/695703?mobileUi=0&journalCode=jg

    https://news.ku.edu/2018/01/30/new-...-human-beings-witnessed-fires-larger-dinosaur

    https://sacredgeometryinternational.com/wp-content/uploads/2018/02/Wolbach-2018-Fire-Part-1-MS.pdf

    https://www.researchgate.net/public...pact_12800_Years_Ago_1_Ice_Cores_and_Glaciers

    OK'
    Question
    agree?
    or not?
    and why?
     
    Xelasnave.1947 likes this.
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  3. sculptor Valued Senior Member

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    Ok
    one more likelihood
    along with the megafauna upon which the clovis people feasted
    the clovis people too were killed by the event
     
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  5. Xelasnave.1947 Valued Senior Member

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    I like the notion of a huge sea level rise in the mix.
    Alex
     
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  7. sculptor Valued Senior Member

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    Prior to the younger dryas, we seem to have had meltwater pulse 1a during which sea levels may have risen 25 meters
    curiously
    during the 1000 years odd the younger dryas cold snap
    there does not seem to be an associated sea level fall
     
  8. Xelasnave.1947 Valued Senior Member

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    I have been looking at the various utube vids.
    Imagine if we experienced the sea level rise that apparently occured...we would go back to near stone age overnight...I like the proposition of a relatively advanced civilization being wipedd out ...not that I like death and destruction but it is an interesting matter.

    Alex
     
  9. sculptor Valued Senior Member

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    I would rather imagine
    the arctic desert and tundra replaced by a lush, green arctic forest,
    extended growing seasons throughout the temperate zones
    sporting enthusiasts wind surfing on the arctic ocean

    but
    to each their own
     
  10. iceaura Valued Senior Member

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    27,840
    Too dry for glacial buildup?
    Taking the ten thousand year view - sure. Although the land areas will not work out as hoped, likely.
    Meanwhile, next couple of hundred years: the corn belt goes dry, the permafrost melts and goes to alders and willows in the wetter areas while catching fire in the drier ones, all the people currently supported by wet rice river delta agriculture take stock of their options elsewhere , and the people in India, Pakistan, and China driven out by wet bulb temps have already moved.
    In China, that means millions of men with no wives and no place to live, looking around.
     
  11. Xelasnave.1947 Valued Senior Member

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    5,600
    I have just started looking into this..sorry I know it is off topic but I thought it may interest you.
    Alex
     
  12. iceaura Valued Senior Member

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    On second thought, too dry would apply only to the cold snap areas - in Antarctica, it just didn't get much colder. The Younger Dryas was not a global cold snap:
     
  13. sculptor Valued Senior Member

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    5,572
    My perspective:
    A small amount of digging and a large amount of speculation.................(take it with a grain)
     
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  14. sculptor Valued Senior Member

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    5,572
    During further research, perhaps I erred in #4 above? There does seem to be documented evidence of a sea level lowstand during the younger dryas.

    Also. evidence of the younger dryas can be found in the south pacific, and the aforementioned residue from the wildfires is evident in the antarctic ice.
     
  15. iceaura Valued Senior Member

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    But not the cold snap. So no uptake of water into Antarctic or Andean ice would be expected, necessarily. Sea level would be affected by land ice accumulation in an are of the northern hemisphere centered around Greenland, a limited and much-complicated factor, by expectation.
     

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