Exploring abrupt climate change induced by comets and asteroids during human history

Viva la Verde! Just in pic of radioactive Mexican green clay

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Melissa Scruggs of the U of Missouri gang kindly sent me this tantalizing taste of their recently reported find of a YD-start age radioactive green mat.  She said they have A LOT of samples they are working through and should report their findings in April.   Understandably, they chose to share only a single photo without much context before the results are published.  Thanks from The Tusk — and let us know when the findings are public!

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