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Thread: Researchers find fossil "snapshot" of asteroid impact 66MYA

  1. #1
    Join Date
    Aug 2005
    NEOTP Atlanta, GA

    Researchers find fossil "snapshot" of asteroid impact 66MYA

    Paleontologists have uncovered a site of what they say appears to be a jumble of life that may have been swept deep inland from the Chicxulub impactor, depositing biologic material and sediment as far away as North Dakota.

    From the NY Times:

    In an article made available to reporters Friday in Proceedings of the National Academy of Sciences, a leading science journal, an international team of 12 scientists described a dig near Bowman, N.D., that encapsulated the swift demise of an ancient lake and its inhabitants.

    When the meteor smashed into waters near what is now Mexico’s Yucatán Peninsula, it left a giant crater known as Chicxulub and prompted upheavals thousands of miles away, including what is now North Dakota. Within hours and perhaps minutes of the titanic collision, sea creatures were swept inland by tsunamis and earthquakes, tossed together and deposited with a diverse array of landlocked life, including trees, flowers and vanished types of freshwater fish.

    The jumble was swiftly entombed, and exquisitely preserved. Permeating the deposit were tiny spheres of clay and glass, known as tektites, which formed as molten rock, ejected by the impact, showered from the sky.
    Related story here from the New Yorker.

  2. #2
    Join Date
    Sep 2004
    More on same.

    66-million-year-old deathbed linked to dinosaur-killing meteor
    by University of California - Berkeley ,, March 29, 2019

    The beginning of the end started with violent shaking that raised giant waves in the waters of an inland sea in what is now North Dakota. Then, tiny glass beads began to fall like birdshot from the heavens. The rain of glass was so heavy it may have set fire to much of the vegetation on land. In the water, fish struggled to breathe as the beads clogged their gills.

    [it gets worse--REM]
    Do good work. —Virgil Ivan "Gus" Grissom

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