قالب وردپرس درنا توس
Home https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ Science https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ A 'fossil graveyard' is linked to the asteroid that killed the dinosaurs, study says

A 'fossil graveyard' is linked to the asteroid that killed the dinosaurs, study says



The team of paleontologists from the University of Kansas and the University of Manchester found the "motherlodge of exquisitely preserved animal and fish fossils" in North Dakota, according to a study published Monday.

The impact of the asteroid, which created the Chicxulub crater beneath the Mexican Yucatan Peninsula, was one of the most destructive events in Earth's history, extinguishing 75% of the planet's animal and plant species. including massive tsunami-like surges and "ejecta" – torrents of rocks, like fine sand and small glass beads – the report said.

"A tsunami would have taken at least 17 or more hours to reach the site from the but seismic waves ̵
1; and a subsequent surge – would have reached it in ten minutes, "said Robert DePalma, lead author's report.

At the Fossil Site – Tanis in North Dakota's Hell Creek Formation – the surge left "a tangled mass of freshwater fish, terrestrial vertebrates, trees, branches, logs, marine ammonites and other marine creatures," DePalma, a student from the University of Kansas, said.

"No other site has a record like that," said DePalma. "And this particular event is tied directly to all of us – to every mammal on Earth, in fact. Because this is basically where we inherited the planet, it was not the same after that impact. planet of dinosaurs. "

 Meteor lights up the night sky over northern Florida [19650015][19459002</div>
<p> the University of Manchester and co-author of the study, called the "unique geological and paleontological treasure", which contains the first direct evidence of larger organisms killed by the impact of Chicxulub </p>
<p> "The sediments, fossils and associated impact debris makes this an important site for those who study the extinction event that helped wipe out the dinosaurs, "he said. </p><div><script async src=

However, prominent paleontologists not involved in the study sounded a note of caution.

"The geological interpretation seems very credible to me, and fish fossils seem to record a catastrophic event at or near the asteroid impact." But the dinosaur aspect of the story is not so clear to me, "Stephen Brusatte, and lecturer and researcher in paleontology at the University of Edinburgh, told CNN

"The only dinosaur fossil mentioned in the paper is a single partial hip bone," he added. "I hope there are other dinosaur fossils at the site, and I'm looking forward to hearing more about them."

 Meet & # 39; Scotty, & lt; RTI ID = 0.0 & gt; the largest Tyrannosaurus rex ever discovered

Paul Upchurch, professor of paleontology at University College London, also had some reservations about the study's findings. very satisfying to get a snapshot of what has happened in a particular part of the world – it certainly adds to the evidence of how devastating the impact was, even hundreds or thousands of miles away, "he told CNN

However, he added that if the ejecta came from a different or perhaps much smaller impact at a different time and place, or the ejecta did come from Chicxulub but remained in the water system for a long time afterward, then it is possible that the fish etc .. "

This is the only way to do that with the Chicxulub impact."
Source link