Asteroid Dust Caused 15-Year Winter That Killed Dinosaurs … – Slashdot
Around 66 million years ago, the Chicxulub asteroid caused a mass extinction event, killing three-quarters of life on Earth, including the dinosaurs. A new study suggests that fine silicate dust from the asteroid, which remained in the atmosphere for up to 15 years, played a more significant role in causing the impact winter and extinction than previously thought. Phys.Org reports: Fine silicate dust from pulverized rock would have stayed in the atmosphere for 15 years, dropping global temperatures by up to 15 degrees Celsius, researchers said in a study in the journal Nature Geoscience. […] For the study, the international team of researchers was able to measure dust particles thought to be from right after the asteroid struck. The particles were found at the Tanis fossil site in the US state of North Dakota.
Though 3,000 kilometers (1,865 miles) away from the crater, the site has preserved a number of remarkable finds believed to be dated from directly after the asteroid…
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