An international group of researchers working jointly on a study of material from the Yucatán Peninsula’s famous Chicxulub impact crater has pieced together the chemical composition of meteoritic dust with that of the geological belt pertaining to the dinosaur extinction. There appear to be clear signs that the thin layer of dust left over on Earth’s crust 66 million years ago originated from an impact event at this very spot. “We are now at the level of coincidence that geologically doesn’t happen without causation”, says geoscientist Sean Gulick from the University of Texas. Joining efforts with fellow geoscientist Joanna Morgan from Imperial College London, Gulick led an expedition in 2016 to retrieve samples of shattered rock lumps from over half a kilometre into the crater’s peak circle. Measurements conducted by four different labs have hinted at a curious timeline which suggests an abrupt drop in dinosaur populations over a very short time, thought to be just a decade or two. © CC0 / urikyo33 / asteroid Is This the End? ‘Stadium-Sized’ Asteroid to Come Close to Earth, NASA Warns “If you’re actually going to put a clock on extinction 66 million years ago, you could easily make an argument that… Read full this story
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