US News: The Dinosaur-Killing Asteroid Acidified the Ocean in a Flash - - PressFrom - United Kingdom
  •   
  •   

US News The Dinosaur-Killing Asteroid Acidified the Ocean in a Flash

09:55  22 october  2019
09:55  22 october  2019 Source:   msn.com

Two men arrested in connection with fatal stabbing of Derek Reddin in Loughlinstown released without charge

  Two men arrested in connection with fatal stabbing of Derek Reddin in Loughlinstown released without charge Two men arrested in connection with fatal stabbing of Derek Reddin in Loughlinstown released without chargeThe men, both in their 30s, were arrested yesterday following the incident on Loughlinstown Drive in the early hours of Tuesday.

What happened to the dinosaurs when an asteroid about six miles wide struck Earth some 66 million years ago in what is today Mexico is well known: It wiped them out. But the exact fate of our planet ’s diverse ocean dwellers at the time — shelly ammonites

But the exact fate of our planet ’s diverse ocean dwellers at the time — shelly ammonites, giant mosasaurs and other sea creatures — has not New research now makes the case that the same incident that helped bring an end to the reign of the dinosaurs also acidified the planet ’s oceans

  The Dinosaur-Killing Asteroid Acidified the Ocean in a Flash © New York Times What happened to the dinosaurs when an asteroid about six miles wide struck Earth some 66 million years ago in what is today Mexico is well known: It wiped them out. But the exact fate of our planet’s diverse ocean dwellers at the time — shelly ammonites, giant mosasaurs and other sea creatures — has not been as well understood.

  The Dinosaur-Killing Asteroid Acidified the Ocean in a Flash © Getty New research now makes the case that the same incident that helped bring an end to the reign of the dinosaurs also acidified the planet’s oceans, disrupted the food chain that sustained life underwater and resulted in a mass extinction. The study, published Monday in Proceedings of the National Academy of Sciences, aims to shore up the hypothesis that the Chicxulub event’s destruction of marine life — the result of sulfur-rich rocks depositing acid rain into the oceans — was just as severe as the fire and fury it brought to land.

Dutch Brexit party will go ahead – whether or not UK leaves EU

  Dutch Brexit party will go ahead – whether or not UK leaves EU The party started as a joke that went viral on Facebook.The party started as a joke that went viral on Facebook about gathering on the beach to wave goodbye to the Brits on October 31.

A new scientific model has discovered what actually happened to the earth after the asteroid impact that killed the dinosaurs . What Color Were Dinosaurs

of the famous dinosaur - killing asteroid that struck the planet about 66 million years ago. As the asteroid plowed into Earth with billions of times the energy of an atomic bomb, shock these sudden emissions, according to the researchers, may have warmed the planet and acidified the oceans for

  The Dinosaur-Killing Asteroid Acidified the Ocean in a Flash © Getty

“It’s flash acidification, and it transformed ecosystems for millions of years,” said Noah Planavsky, a biogeochemist at Yale and one of the study’s authors. “We were shocked that we actually found this.”

Sign Up For the Morning Briefing: Asia and Australia Newsletter

The impact of the Chicxulub asteroid — so named for the crater it carved out around the Gulf of Mexico — sent columns of rock into Earth’s atmosphere, incinerated the planet’s forests and drove tsunamis far across the oceans. But the connection between the crash and the marine extinction has been less solid.

a close up of a rock: Foram shells, shown at eight times magnification, collected in the Geulhemmerberg caves in the Netherlands. They offered clues to the ocean’s acid levels after the asteroid struck. © Michael J. Henehan Foram shells, shown at eight times magnification, collected in the Geulhemmerberg caves in the Netherlands. They offered clues to the ocean’s acid levels after the asteroid struck.

That gap in understanding was on the mind of Michael Henehan, a geochemist, when he attended a conference in 2016 in the Netherlands that included a group outing to the cave system at Geulhemmerberg, which contains stones from the end of the Cretaceous period. There, he came upon a surprisingly thick rock layer made of grey clay that formed just after the asteroid hit. Lacking proper rock sample bags, he emptied the contents of his lunch into his pockets, collected some rocks and put them into his lunch bags.

Nightmare for 192 Audi owner as flash Dublin reg car gets 'sacrificed to Atlantic'

  Nightmare for 192 Audi owner as flash Dublin reg car gets 'sacrificed to Atlantic' Nightmare for 192 Audi owner as flash Dublin reg car gets 'sacrificed to Atlantic'Incredible images show the brand new motor getting caught up on a Donegal beach as the waves from the Atlantic swallow it up.

The asteroid which wiped out the dinosaurs acidified the oceans and cemented the creatures’ tragic fate, scientists have claimed. Co-author Dr James Rae, of St Andrews University, said: ‘For a long time people have thought there might be a decrease in ocean pH because the meteorite hit

Dinosaur - killing impact acidified oceans . Skip to sections navigation Skip to content Skip to footer. Illustration the asteroid that ended the reign of the dinosaurs . This mixed with water vapour to create sulphuric acid rain, which would have fallen to the planet 's surface within days, acidifying the surface

Back in the lab at Yale University, Dr. Henehan, who is now a researcher at GFZ Helmholtz Center in Potsdam, Germany, cleaned the rocks and found the fossil shells of thousands of tiny marine plankton called foraminifera, or “forams.” Finding so many shells was fortunate, he explained, because they preserve trace amounts of boron, a chemical element that is sparse in such fossils, but offers clues to the ancient acid levels of the oceans when enough of it can be found.

This is the boundary that marks the transition from the Cretaceous to the Paleogene eras in the Geulhemmerberg caves. © Michael J. Henehan This is the boundary that marks the transition from the Cretaceous to the Paleogene eras in the Geulhemmerberg caves. Dr. Henehan and his team measured the boron, and found that the relative proportions of two isotopes of the element changed abruptly right at the time of the impact. In shells like these, Dr. Planavsky explained, proportions of the boron isotopes shift when the acidity of the oceans rises. And because this ancient shift happened in the first 100 to 1,000 years after the impact, it means the oceans became acidic practically overnight.

Hollywood actor Mark Ruffalo calls on the Irish Government not to import 'fracked' gas from United States

  Hollywood actor Mark Ruffalo calls on the Irish Government not to import 'fracked' gas from United States The actor has campaigned against fracking gas in the US for 10 years and asks the Government to 'think of their brothers and sisters in America'American film star Mark Ruffalo called on the Irish Government to stop importing fracked gas from the United States due to it 'harming and killing people there'.

This coincides with a sudden impact killing off the dinosaurs - ruling out other catastrophes such as volcanic eruptions, climate change or disease. It's the first direct link between the death of the dinosaurs and a sharp drop in the pH levels of the oceans - indicating a rise in ocean acidity .

Different parts of the planet were affected in different ways, and new research shows that Earth’s oceans and coastal regions dealt with their own hardship It goes without saying that anything in the immediate vicinity of the asteroid impact was utterly destroyed, but a new study suggests the location

Related: Biggest meteor craters on earth (Photos)

The flash acidification would have devastated organisms that formed the foundations of ecosystems, leading to problems for other creatures like the ammonites that lived higher up the food chain.

Scientists unearth huge claw from 110-million-year-old carnivorous dinosaur

  Scientists unearth huge claw from 110-million-year-old carnivorous dinosaur An 8-inch sickle-shaped claw from the Cretaceous period hints at a new species of megaraptorid.A handful of bones, including an 8-inch (20-centimeter) claw found in the 107 million-year-old Eumeralla Formation in Australia, point to the discovery of a new species of carnivorous dinosaur. The rare find has intrigued paleontologists because the bones look almost identical to a previously-discovered species that lived around 10 million years later and thousands of miles further north.

The enormous asteroid that struck the Earth 66 million years ago not only wiped out the dinosaurs , but drastically changed the behaviour of mammals. A new study has found that mammals only started being active in the daytime after non-avian dinosaurs were wiped out. The findings provide key

“This is a big leap forward,” said Chris Lowery, a paleoceanographer at the University of Texas at Austin who was not involved in the new work.

Related: The most valuable dinosaurs ever found (Lovemoney)

Fossilized fortunes: Dinosaurs are big business in the auction world. It's rare to find these prehistoric creatures intact, so when it happens they can go for eye-watering amounts. It's not just paleontologists who are fascinated by these creatures either. Dinosaurs have, somewhat controversially, become hip decorative objects, with Hollywood actors including Leonardo Di Caprio and Nicolas Cage bagging fancy fossils. Starting from the least to the most expensive, these are the world's most valuable dinosaurs.

The study offers evidence of what sustained the marine extinction after the asteroid impact got things rolling. That, and it confirms that the asteroid triggered the extinction in the first place.

Around the time that the asteroid struck, there was intense volcanic activity in what is today India, causing over 200,000 cubic miles of lava to be disgorged over the course of about a million years. For a long time, it was not clear if the marine mass extinction stemmed from changes wrought by the volcanism or by the asteroid. But because the boron shift happened exactly at the boundary, it is now obvious that the asteroid had the bigger effect.

“It’s very, very strong evidence that the ocean acidification was caused by the impact and not volcanoes,” Dr. Lowery said.

The flash acidification and mass extinction, though ancient events, are relevant to our modern world. According to reports from the United Nations Intergovernmental Panel on Climate Change, human emissions of carbon dioxide are not only warming the planet, but also acidifying the oceans. And that modern acidification, Dr. Planavsky says, is happening at a rate and scale comparable to the asteroid-triggered acidification. A similar result, he said, “is on the extreme end of what we could get in the next 100 years.”

MSN UK is committed to Empowering the Planet and taking urgent action to protect our environment. We’re supporting Friends of the Earth to help solve the climate crisis - please give generously here or find out more about our campaign here.


Scientists unearth huge claw from 110-million-year-old carnivorous dinosaur .
An 8-inch sickle-shaped claw from the Cretaceous period hints at a new species of megaraptorid.A handful of bones, including an 8-inch (20-centimeter) claw found in the 107 million-year-old Eumeralla Formation in Australia, point to the discovery of a new species of carnivorous dinosaur. The rare find has intrigued paleontologists because the bones look almost identical to a previously-discovered species that lived around 10 million years later and thousands of miles further north.

—   Share news in the SOC. Networks

Topical videos:

usr: 9
This is interesting!