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For years, scientists have blamed an asteroid for eliminating dinosaurs, causing wildfires and tsunamis and sending so much sulfur into the atmosphere that sunlight was obstructed by l & # 39; impact.
At present, scientists have tangible evidence to support this assessment thanks to researchers at the University of Texas. They found solid evidence in hundreds of feet of rock that filled the site of the impact during the first day that followed the gigantic asteroid.
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Researchers provide the most detailed look at the consequences
The evidence is made of pieces of charcoal and rocks without sulfur. They are part of a rock record Sean Gulick, professor-researcher at the Jackson School of Geosciences (UTIG) of the University of Texas Institute for Geosciences, led the research and presented the most detailed results on the consequences of the asteroid that ended the era of dinosaurs.
"It's a bigger number of events that we've been able to recover from scratch," Gulick said in a press release announcing the study, which was published in Proceedings of the National Academy of Sciences. "It tells us about the processes of impact from an eyewitness place."
The study was based on previous research on crater formation and the time needed to recover from the devastation. More than two dozen scientists around the world contributed to this study.
The rocks that filled the crater were sulfur free
The researchers found that most of the materials that filled the crater after the asteroid hit had been produced at the impact site or had been introduced by sea water returned to the crater of the Gulf of Mexico. . Since many materials were deposited quickly in the crater, researchers were able to obtain indications of the lasting effects of the impact. Gulick described it as a hell that did not last long, followed by a longer cooling period around the world. "We fried them and then froze them," said Gulick. "Not all dinosaurs died that day, but many dinosaurs are dead."
So what was the life of the dinosaurs when the asteroid had an impact?
The researchers said the impact was equal to the power of 10 billion atomic bombs the size of the one used during the Second World War. At impact, fires broke out and trees and plants ignited thousands of kilometers away. Meanwhile, a huge tsunami that has hit Illinois has flooded the planet. In addition, researchers said they found evidence that the burned landscape had also been carried into the crater when the tsunami had receded.
Real killer of atmospheric dinosaurs
According to the researchers, one of the most important points to remember is that none of the rocks in the impact crater had sulfur, unlike the surrounding rocks. This confirms the theory that the asteroid vaporized the sulfur minerals at the site of the impact, sending it into the atmosphere, which reflected sunlight and set off the cooling period.
"The real killer must be atmospheric," said Gulick. "The only way to achieve global mass extinction like this is an atmospheric effect."
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