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Major meteor impact in 12,800 years ago is documented

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  • Major meteor impact in 12,800 years ago is documented

    This documented major meteor impact is important in understand the recent evolution that lead to nature and distribution of species today. In fact it adds to the importance of meteor impacts through the history of life on earth having a major determining impact on the history of the evolution of life in rsponce to the extinction events.

    Source: https://www.sciencedaily.com/releases/2019/03/190313140616.htm



    Major cosmic impact 12,800 years ago

    Geologic and paleontological evidence unearthed in southern Chile supports the theory that a major cosmic impact event occurred approximately 12,800 years ago.

    When UC Santa Barbara geology professor emeritus James Kennett and colleagues set out years ago to examine signs of a major cosmic impact that occurred toward the end of the Pleistocene epoch, little did they know just how far-reaching the projected climatic effect would be.

    "It's much more extreme than I ever thought when I started this work," Kennett noted. "The more work that has been done, the more extreme it seems."

    He's talking about the Younger Dryas Impact Hypothesis, which postulates that a fragmented comet slammed into the Earth close to 12,800 years ago, causing rapid climatic changes, megafaunal extinctions, sudden human population decrease and cultural shifts and widespread wildfires (biomass burning). The hypothesis suggests a possible triggering mechanism for the abrupt changes in climate at that time, in particular a rapid cooling in the Northern Hemisphere, called the Younger Dryas, amid a general global trend of natural warming and ice sheet melting evidenced by changes in the fossil and sediment record.

    Controversial from the time it was proposed, the hypothesis even now continues to be contested by those who prefer to attribute the end-Pleistocene reversal in warming entirely to terrestrial causes. But Kennett and fellow stalwarts of the Younger Dryas Boundary (YDB) Impact Hypothesis, as it is also known, have recently received a major boost: the discovery of a very young, 31-kilometer-wide impact crater beneath the Greenland ice sheet, which they believe may have been one of the many comet fragments that impacted Earth at the onset of the Younger Dryas.

    Now, in a paper published in the journal Nature Scientific Reports, Kennett and colleagues, led by Chilean paleontologist Mario Pino, present further evidence of a cosmic impact, this time far south of the equator, that likely lead to biomass burning, climate change and megafaunal extinctions nearly 13,000 years ago.

    "We have identified the YDB layer at high latitudes in the Southern Hemisphere at near 41 degrees south, close to the tip of South America," Kennett said. This is a major expansion of the extent of the YDB event." The vast majority of evidence to date, he added, has been found in the Northern Hemisphere.

    © Copyright Original Source

    Glendower: I can call spirits from the vasty deep.
    Hotspur: Why, so can I, or so can any man;
    But will they come when you do call for them? Shakespeare’s Henry IV, Part 1, Act III:

    go with the flow the river knows . . .

    Frank

    I do not know, therefore everything is in pencil.

  • #2
    Originally posted by shunyadragon View Post
    This documented major meteor impact is important in understand the recent evolution that lead to nature and distribution of species today. In fact it adds to the importance of meteor impacts through the history of life on earth having a major determining impact on the history of the evolution of life in rsponce to the extinction events.

    Source: https://www.sciencedaily.com/releases/2019/03/190313140616.htm



    Major cosmic impact 12,800 years ago

    Geologic and paleontological evidence unearthed in southern Chile supports the theory that a major cosmic impact event occurred approximately 12,800 years ago.

    When UC Santa Barbara geology professor emeritus James Kennett and colleagues set out years ago to examine signs of a major cosmic impact that occurred toward the end of the Pleistocene epoch, little did they know just how far-reaching the projected climatic effect would be.

    "It's much more extreme than I ever thought when I started this work," Kennett noted. "The more work that has been done, the more extreme it seems."

    He's talking about the Younger Dryas Impact Hypothesis, which postulates that a fragmented comet slammed into the Earth close to 12,800 years ago, causing rapid climatic changes, megafaunal extinctions, sudden human population decrease and cultural shifts and widespread wildfires (biomass burning). The hypothesis suggests a possible triggering mechanism for the abrupt changes in climate at that time, in particular a rapid cooling in the Northern Hemisphere, called the Younger Dryas, amid a general global trend of natural warming and ice sheet melting evidenced by changes in the fossil and sediment record.

    Controversial from the time it was proposed, the hypothesis even now continues to be contested by those who prefer to attribute the end-Pleistocene reversal in warming entirely to terrestrial causes. But Kennett and fellow stalwarts of the Younger Dryas Boundary (YDB) Impact Hypothesis, as it is also known, have recently received a major boost: the discovery of a very young, 31-kilometer-wide impact crater beneath the Greenland ice sheet, which they believe may have been one of the many comet fragments that impacted Earth at the onset of the Younger Dryas.

    Now, in a paper published in the journal Nature Scientific Reports, Kennett and colleagues, led by Chilean paleontologist Mario Pino, present further evidence of a cosmic impact, this time far south of the equator, that likely lead to biomass burning, climate change and megafaunal extinctions nearly 13,000 years ago.

    "We have identified the YDB layer at high latitudes in the Southern Hemisphere at near 41 degrees south, close to the tip of South America," Kennett said. This is a major expansion of the extent of the YDB event." The vast majority of evidence to date, he added, has been found in the Northern Hemisphere.

    © Copyright Original Source

    This is one of several strikes from around that time that could very well have had an... impact

    I'm always still in trouble again

    "You're by far the worst poster on TWeb" and "TWeb's biggest liar" --starlight (the guy who says Stalin was a right-winger)
    "Overall I would rate the withdrawal from Afghanistan as by far the best thing Biden's done" --Starlight
    "Of course, human life begins at fertilization that’s not the argument." --Tassman

    Comment


    • #3
      Originally posted by rogue06 View Post
      This is one of several strikes from around that time that could very well have had an... impact
      Groooooan.

      Comment


      • #4
        Originally posted by rogue06 View Post
        This is one of several strikes from around that time that could very well have had an... impact
        Yes, throughout geologic history. At the time of this impact there are a few other candidates like the Greenland impact that may indicate we were hit by several meteors at once. Unfortunately the Greenland impact is not well dated, and is a maybe between 3 million+ and 12 thousand years ago. This impact is probably the best documented and dated.
        Glendower: I can call spirits from the vasty deep.
        Hotspur: Why, so can I, or so can any man;
        But will they come when you do call for them? Shakespeare’s Henry IV, Part 1, Act III:

        go with the flow the river knows . . .

        Frank

        I do not know, therefore everything is in pencil.

        Comment


        • #5
          Originally posted by shunyadragon View Post
          Yes, throughout geologic history. At the time of this impact there are a few other candidates like the Greenland impact that may indicate we were hit by several meteors at once. Unfortunately the Greenland impact is not well dated, and is a maybe between 3 million+ and 12 thousand years ago. This impact is probably the best documented and dated.
          There are other contenders during that time, which was what I was referring to, including the Carolina Bays along the Atlantic seaboard and Lake Cuitzeo in central Mexico. Many suggest a potential air burst meaning that a crater wouldn't be found.

          I'm always still in trouble again

          "You're by far the worst poster on TWeb" and "TWeb's biggest liar" --starlight (the guy who says Stalin was a right-winger)
          "Overall I would rate the withdrawal from Afghanistan as by far the best thing Biden's done" --Starlight
          "Of course, human life begins at fertilization that’s not the argument." --Tassman

          Comment


          • #6
            And if it hadn't exploded mid-air ...
            1Cor 15:34 Come to your senses as you ought and stop sinning; for I say to your shame, there are some who know not God.
            .
            ⊛⊛⊛⊛⊛⊛⊛⊛⊛⊛⊛⊛⊛⊛⊛⊛⊛⊛⊛⊛⊛⊛
            Scripture before Tradition:
            but that won't prevent others from
            taking it upon themselves to deprive you
            of the right to call yourself Christian.

            ⊛⊛⊛⊛⊛⊛⊛⊛⊛⊛⊛⊛⊛⊛⊛⊛⊛⊛⊛⊛⊛

            Comment


            • #7
              Originally posted by rogue06 View Post
              There are other contenders during that time, which was what I was referring to, including the Carolina Bays along the Atlantic seaboard and Lake Cuitzeo in central Mexico. Many suggest a potential air burst meaning that a crater wouldn't be found.
              I more go with a possible break up and multiple impacts, but yes all the evidence is not in. I will discount the Carolina Bays as related to meteorites in any form.I am a geomorphologist that spent 8 years mapping soils and geomorphology in the Carolina Coastal Plain, and easily conclude that the Carolina Bays formed in very shallow coastal waters by turbulence from strong currents originating from the Gulf Stream in sandy coastal plain deposits. I mapped around and in these depressions and found them dominantly very uniform coastal plain sands with no signs of any other materials.

              I consider LAke Cuitzeo is likely a candidate for a low angle impact crater within that time frame.
              Glendower: I can call spirits from the vasty deep.
              Hotspur: Why, so can I, or so can any man;
              But will they come when you do call for them? Shakespeare’s Henry IV, Part 1, Act III:

              go with the flow the river knows . . .

              Frank

              I do not know, therefore everything is in pencil.

              Comment

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