New fossils may capture the minutes after the dinosaur-killing asteroid impact

https://www.sciencenews.org/article/new-fossils-north-dakota-dinosaur-killing-asteroid-impact?tgt=nr

 

New fossil finds in the Hell Creek Formation in North Dakota at a site dubbed Tanis have been dated back to just hours following the asteroid impact that caused the extinction of all non-bird dinosaurs and 75% of land based species. Ir provides a very clear picture of the immediate hours following the event and shining a light on just exactly how many of the species were killed.

The new image of the aftermath of the event paints a picture of a massive explosion which triggered earthquakes somewhere between magnitude 10 and 11.5. The tremors caused the shallow sea that covered North America at the time to slosh back and forth with huge tsunamis, burying freshwater plant and animal species in the mud in an instant, leading to the fossils the scientists are using to extrapolate this event. Also at the site small spheres of silica glass surrounded by clay thousands of miles out from the impact site reveal the sheer power of the asteroid's impact with earth.

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