WASHINGTON (AP) – The study published on Friday shows a fossilized snapshot of the day nearly 66 million years ago, when an asteroid clattered to the ground, fires rained from the sky and the ground was far worse than any modern earthquake.
It It was the day almost all life on earth, including the dinosaurs, became extinct.
The researchers say they have found evidence in North Dakota of the asteroid hit in Mexico, including fish with hot glass in the gills of flaming debris that spewed back down on Earth. They also reported the discovery of charred trees, evidence of a tsunami inland, and molten amber.
Jan Smit of the University of Amsterdam revealed that he and his colleagues had found traces of dinosaurs even before they died.
Smit said footprints ̵
"This is the death blow received at a particular location. This is simply spectacular, "said Purdue University geophysicist and impact expert Jay Melosh, who was not involved in the research but edited the paper published Friday by the National Academy of Sciences' Proceedings journal.
Discovery of the Century "Other experts said some of the work is intriguing, but they have some serious research concerns, including the lack of access to this particular Hell Creek formation site for external scientists, Hell Creek – the Montana, both Dakota as well as Wyoming – is a fossil treasure trove that contains numerous species of dinosaurs, mammals, reptiles, and fish trapped in clay and stone from 65 to 70 million years ago.
Kirk Johnson, director of The Smithsonian National Museum of Natural History, which has also explored the Hell Creek area for 38 years, said the Ar on fish, glass and trees "show some details of the event of THE DAY. That's all very interesting and very valid. However, Johnson said that other researchers can not confirm the research because access to the site is limited. Smit said the restrictions were to protect the site from poachers. Johnson also voiced concerns over allegations by lead author Robert DePalma, a graduate student from the University of Kansas, who published the scientific paper in a New York Journal article published on Friday. DePalma did not return an e-mail or telephone message search.
For decades, the massive asteroid crash that has caused the Chicxulub Crater on the Mexican Yucatan Peninsula is considered the probable cause of mass extinction, often referred to as the "KT boundary" splitting between two geological periods. However, some scientists have insisted that massive volcanic activity played a role. Johnson and Melosh said this proves the asteroid crash case.
There were few dinosaur fossils from that era, but convincing the steps, Smit said.
There were more than just dinosaurs, he said. The site includes ant nests, wasp nests, fragile preserved leaves, and fish caught dying. He said that the fish are swollen soon after the death of the fish and that these fossils did not show any swelling.
The researchers say the inland tsunami indicates a massive earthquake due to the asteroid crash, somewhere between a magnitude of 10 and 11. This is more than 350 times stronger than the San Francisco earthquake of 1906.
Purdues Melosh said as he read the study, he kept saying, "Wow, Wow, what a find."
The details that come out are "overwhelming," he said.