Found: fossil 'mother lode' created by asteroid that wiped out dinosaurs


1/4/2019 19:29:00
Print
     .

US researchers reveal haul of perfectly preserved fossils dating back to Chicxulub impact that wiped out most of Earth’s life

 

Scientists in the US say they have discovered the fossilised remains of a mass of creatures that died minutes after a huge asteroid hit the Earth 66m years ago, sealing the fate of the dinosaurs.

 

In a paper to be published on Monday, a team of paleontologists at the University of Kansas say they found a “mother lode of exquisitely preserved animal and fish fossils” in what is now North Dakota.

 

The asteroid’s impact – creating the Chicxulub crater in what is now Mexico – was the most cataclysmic event in Earth’s history, eradicating 75% of the planet’s animal and plant species, extinguishing the dinosaurs and paving the way for the rise of humans.

 

Researchers believe the impact set off fast-moving, seismic surges that triggered a sudden, massive torrent of water and debris from an arm of an inland sea known as the Western Interior Seaway.

 

At the fossil site – called 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”, according to Robert DePalma, the report’s lead author.

 

Some of the fish fossils were found to have inhaled “ejecta” associated with the Chicxulub event, suggesting seismic surges reached North Dakota within “tens of minutes”, he said.

 

“The sedimentation happened so quickly everything is preserved in three dimensions – they’re not crushed,” said co-author David Burnham. “It’s like an avalanche that collapses almost like a liquid, then sets like concrete. They were killed pretty suddenly because of the violence of that water. We have one fish that hit a tree and was broken in half.”

 

The fossils at Tanis include what were believed to be several newly identified fish species, and others that were “the best examples of their kind”, said DePalma, curator of the Palm Beach Museum of Natural History in Florida.

 

“We look at moment-by-moment records of one of the most notable impact events in Earth’s history. No other site has a record quite like that,” he said.

 

“And this particular event is tied directly to all of us – to every mammal on Earth, in fact. Because this is essentially where we inherited the planet. Nothing was the same after that impact. It became a planet of mammals rather than a planet of dinosaurs.”

 

 

 

PUKmedia / TheGuardian 


 

KRG Representative in Poland at the Economic Forum


Ziyad Raoof KRG Representative in Poland participated in 29 th edition of the Economic Forum in Krynica (Poland). It is one of the biggest political and economic conference in East- Central Europe ...


»  Top thinker Caucher Birkar talks maths and migration
»  A Kurdish guy saves the lives of 6 people
 

A political analyst: The subject of the disappeared will be raised for electoral campaigns


Political analyst, Wathiq al-Hashemi stressed that the subject of the disappeared and missing in Iraq cannot be resolved, pointing out that raising it is a part of the election campaigns.

&...


»  Top thinker Caucher Birkar talks maths and migration
»  Taimur of Anfal: Survivor of the Samawa mass graves
 

Displaced persons: 2019 will be one of the worst years on record


Natural disasters have already forced 7 million people from their homes in 2019. Experts expect the number to triple by the end of the year as mass displacement becomes "the norm."

 
»  A forgotten camp in Syria could be the birthplace of ISIS' revenge generation
»  World 'gravely' unprepared for effects of climate crisis


Caricature