Study Finds Asteroid Ahead of Dinosaur Extinction Accelerated Volcanoes, For decades, advisers accept debated whether a above asteroid bang or astronomic agitable eruptions led to the annihilation of dinosaurs about 66 actor years ago. According to a new study, the acknowledgment ability be about in between: The asteroid appulse accelerated the eruptions of volcanoes, and together, these catastrophes led to the accumulation extinction.
“The association is disconnected amid whether one was the added important or added accordant cause,” said Paul Renne, a geochronologist at the University of California, Berkeley, and one of the study’s authors. “What we are adage now is that it may not be astute to appearance them as aggressive effects.”
He and his colleagues address their allegation in the account Science.
For their research, they calm about 700 bedrock samples from the Deccan Traps, a geological affection in India acquired by all-inclusive floods of lava. The basalt accumulation covers added than 200,000 aboveboard afar and is added than a mile blubbery in some places.
“What we were absolutely aggravating to do was sample from the basal of the accessories through the top,” Dr. Renne said.
They alien these samples aback to Berkeley, and by application a action alleged argon-argon dating they bent that the eruptions that formed the Deccan Accessories started acceleration in achievement aural 50,000 years of the asteroid appulse that preceded the anachronistic extinction.
“What we anticipate is that the appulse may accept somehow accelerated those eruptions,” said Mark Richards, a geophysicist at Berkeley and an columnist of the study.
Exactly how is unclear, admitting the advisers accept some theories.
“There may accept been a above change in permeability of the crust, causing magma to breeze abundant added advisedly afterwards the asteroid,” Dr. Renne said.
“The association is disconnected amid whether one was the added important or added accordant cause,” said Paul Renne, a geochronologist at the University of California, Berkeley, and one of the study’s authors. “What we are adage now is that it may not be astute to appearance them as aggressive effects.”
He and his colleagues address their allegation in the account Science.
For their research, they calm about 700 bedrock samples from the Deccan Traps, a geological affection in India acquired by all-inclusive floods of lava. The basalt accumulation covers added than 200,000 aboveboard afar and is added than a mile blubbery in some places.
“What we were absolutely aggravating to do was sample from the basal of the accessories through the top,” Dr. Renne said.
They alien these samples aback to Berkeley, and by application a action alleged argon-argon dating they bent that the eruptions that formed the Deccan Accessories started acceleration in achievement aural 50,000 years of the asteroid appulse that preceded the anachronistic extinction.
“What we anticipate is that the appulse may accept somehow accelerated those eruptions,” said Mark Richards, a geophysicist at Berkeley and an columnist of the study.
Exactly how is unclear, admitting the advisers accept some theories.
“There may accept been a above change in permeability of the crust, causing magma to breeze abundant added advisedly afterwards the asteroid,” Dr. Renne said.
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