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Content of Earth-impacting meteors over time

  1. Jan 24, 2017 #1

    jim mcnamara

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    Staff: Mentor

    http://www.nature.com/articles/s41550-016-0035
    Rare meteorites common in the Ordovician period

    About 466 million years ago, a large asteroid had a really bad day, and
    fragments from the collision have dominated meteorites impacting the Earth
    since that time.

    Circa 1 billion years ago there was a similar event involving the asteroid Vesta
    which dominated the fragments impacting Earth. Back then.

    I guess you could call it: "meteor weather" on a huge time scale.

    phys.org article:
    https://phys.org/news/2017-01-big-picture-meteorites-giant-space-collision.html
     
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