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Researchers reveal 66 million-year-old fish fossils from the day that the dinosaurs died t


April 02, 2019 03:46:01

New research includes a snapshot of its fossilization of the day nearly 66 million years ago when asteroid went into the Earth, rained fire from the sky and shaken the earth. much worse than any modern earthquake.

Key points:

  • Beads of hot glass had rained down following asteroid 66 million years ago
  • The study said that an inland tsunami refers to a huge earthquake 11
  • Other scientists have complained about limited access to the American fossil site

This was the day that almost all life on Earth, including the dinosaurs, disappeared.

The researchers revealed fossil evidence discovered at Tanis, North Dakota, who say they date back to the day of the fatal asteroid hit, including fish with hot glass beads torn in their gills of debris. flaming he showed back on Earth.

The fish cemetery has been fossilized showing the dead sea creatures within the minutes or the first hours after the effect made by asteroid, according to the paper published by t magazine Proceedings of the National Academy of Sciences.

The researchers also said that trees had been leaked, evidence of inland and amber melting.

The author of the article, Robert DePalma, is the curator of palaeontology at the Palm Beach Natural History Museum in Florida and a doctoral student at the University of Kansas.

He told Berkeley University that the slaughter field he examined was the result of the meteor effect, which marked the end of the Cretaceous Period, also known as the KT border, and ended much of life on Earth.

"This is the first mass death collection of large organisms that anyone has found related to the KT border," Mr DePalma said.

Mr DePalma was first notified to the site by a private collector in 2012.

A Purdue University geophysicist and expert Jay Melosh, who was not part of the research but edited the paper released on Friday, called it "the discovery of the century".

"This is the death shot kept on one particular site. This is amazing," he said.

Other scientists say they could not check claims

Separately, Jan Smit at the University of Amsterdam revealed that he and his colleagues had even found dinosaur routes just before they came to an end.

Dr Smit said that the footprints – one of the plant eating harosaur and the other of a meat eater, perhaps Tyrannosaurus small Rex – was a "definite test that the dinosaurs were alive and kicking at the time of the impact … They were running around, chasing each other "when they were drowned.

But other experts said that while some of them Mr DePalma's work is very interesting, they have some serious concerns about the research, including lack of access to this particular Hell Creek Formation fossil site for external scientists.

Hell Creek – spanning Montana, Dakotas and Wyoming – is a fossil treasure that includes many types of dinosaurs, mammals, reptiles and fish caught in clay and stone from 65 to 70 t million years ago.

Kirk Johnson, director of the Smithsonian Natural History Museum who has also studied Hell Creek area for 38 years, said the work on the fish, the glass and the wood "showed some details of what happened on the day". .

"That's absolutely interesting and very valid," he said.

But Dr Johnson said, because there is limited access to the site, other scientists can't confirm the research.

Dr Smit said that the limitations were protecting the site by poachers.

Dr Johnson also raised concerns about allegations made by the lead author, Mr DePalma, who appeared in a New Yorker magazine article published on Friday but not in the scientific paper.

However, when asked about concerns about access to the site, Mr DePalma told the ABC that "other researchers not on the original author list" had already accessed the site on several occasions.

"It's a great and important opportunity for collaborations of this kind, and essentially it's no different from any other major site protected by organizations other than our institutions," he said. he said.

Make a case for the asteroid killer

For decades, the massive asteroid crash that caused the Chicxulub crater in the Yucatan Peninsula in Mexico has been considered the probable cause of the mass extinction.

But some scientists have insisted that a massive volcanic activity plays a part.

Dr Johnson and Dr Melosh said that this helped to prove the cause of an asteroid accident.

Only a few dinosaur fossils were available from that time, but the most convincing feet, says Dr Smit.

There were more than dinosaurs, he said.

The site includes ants nests, wasps nests, leaves and fish kept fragile and caught in the act of dying.

He said soon after the death of fish that they had swollen knots and these fossils he showed no swelling.

The researchers said that the inland tsunami refers to a huge earthquake produced by the asteroid crash, somewhere between size 10 and 11 – one to twice as strong as the 2004 Boxing earthquake, which was found as a magnitude 9.0 earthquake.

Purdue said Dr Melosh as he read the study, he kept saying "wow, wow, what discovery".

The details coming out of this are "blowing mind," he said.




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