Read the Beforeitsnews.com story here. Advertise at Before It's News here.
Profile image
By Alton Parrish (Reporter)
Contributor profile | More stories
Story Views
Now:
Last Hour:
Last 24 Hours:
Total:

Chicxulub Asteroid or Massive Volcanic Eruptions: Dinosaur Killer Named

% of readers think this story is Fact. Add your two cents.


Modelling of the Chicxulub asteroid impact 66 million years ago shows it created a world largely unsuitable for dinosaurs to live in.

The asteroid, which struck the Earth off the coast of Mexico at the end of the Cretaceous era 66 million years ago, has long been believed to be the cause of the demise of all dinosaur species except those that became birds.

 

Top image (Ankylosaurus magniventris drinking as the asteroid strikes)

Dinosaur drinking with an asteroid in the background

Credit: Fabio Manucci

However, some researchers have suggested that tens of thousands of years of large volcanic eruptions may have been the actual cause of the extinction event, which also killed off almost 75% of life on Earth.

Now, a research team from Imperial College London, the University of Bristol and University College London has shown that only the asteroid impact could have created conditions that were unfavourable for dinosaurs across the globe.

They also show that the massive volcanism could also have helped life recover from the asteroid strike in the long term. Their results are published today in Proceedings of the National Academy of Sciences.

The only plausible explanation

Lead researcher Dr Alessandro Chiarenza, who conducted this work whilst studying for his PhD in the Department of Earth Science and Engineering at Imperial, said: “We show that the asteroid caused an impact winter for decades, and that these environmental effects decimated suitable environments for dinosaurs. In contrast, the effects of the intense volcanic eruptions were not strong enough to substantially disrupt global ecosystems.

“Our study confirms, for the first time quantitatively, that the only plausible explanation for the extinction is the impact winter that eradicated dinosaur habitats worldwide.”

 Extinction simulation (gif)

via GIPHY   Credit: : Alfio Alessandro Chiarenza 

The asteroid impact left no suitable habitats for dinosaurs, whereas the volcanic activity (Deccan pulse) left some habitable areas.

The asteroid strike would have released particles and gases high into the atmosphere, blocking out the Sun for years and causing permanent winters. Volcanic eruptions also produce particles and gases with Sun-blocking effects, and around the time of the mass extinction there were tens of thousands of years of eruptions at the Deccan Traps, in present-day India.

To determine which factor, the asteroid or the volcanism, had more climate-changing power, researchers have traditionally used geological markers of climate and powerful mathematical models. In the new paper, the team combined these methods with information about what kinds of environmental factors, such as rainfall and temperature, each species of dinosaur needed to thrive.

They were then able to map where these conditions would still exist in a world after either an asteroid strike or massive volcanism. They found that only the asteroid strike wiped out all potential dinosaur habitats, while volcanism left some viable regions around the equator.
Helping new life evolve

Co-lead author of the study Dr Alex Farnsworth, from the University of Bristol, said: “Instead of only using the geologic record to model the effect on climate that the asteroid or volcanism might have caused worldwide, we pushed this approach a step forward, adding an ecological dimension to the study to reveal how these climatic fluctuations severely affected ecosystems.”

Impact from space

 Credit: Gabriele Chiarenza

 

Co-author Dr Philip Mannion, from University College London, added: “In this study we add a modelling approach to key geological and climate data that shows the devastating effect of the asteroid impact on global habitats. Essentially, it produces a blue screen of death for dinosaurs.”

Although volcanoes release Sun-blocking gases and particles, they also release carbon dioxide, a greenhouse gas. In the short term after an eruption, the Sun-blockers have a larger effect, causing a ‘volcanic winter’. However, in the longer term these particles and gases drop out of the atmosphere, while carbon dioxide stays around and builds up, warming the planet.

After the initial drastic global winter caused by the asteroid, the team’s model suggests that in the longer term, volcanic warming could have helped restore many habitats, helping new life that evolved after the disaster to thrive.

Dr Chiarenza said: “We provide new evidence to suggest that the volcanic eruptions happening around the same time might have reduced the effects on the environment caused by the impact, particularly in quickening the rise of temperatures after the impact winter. This volcanic-induced warming helped boost the survival and recovery of the animals and plants that made through the extinction, with many groups expanding in its immediate aftermath, including birds and mammals.”

Contacts and sources:
Hayley Dunning

Imperial College London

Publication: ‘Asteroid impact, not volcanism, caused the end-Cretaceous dinosaur extinction’ by Alfio Alessandro Chiarenza, Alexander Farnsworth, Philip D. Mannion, Daniel J. Lunt, Paul Valdes, Joanna V. Morgan, Peter A. Allison is published in Proceedings of the National Academy of Sciences.

Before It’s News® is a community of individuals who report on what’s going on around them, from all around the world.

Anyone can join.
Anyone can contribute.
Anyone can become informed about their world.

"United We Stand" Click Here To Create Your Personal Citizen Journalist Account Today, Be Sure To Invite Your Friends.

Please Help Support BeforeitsNews by trying our Natural Health Products below!


Order by Phone at 888-809-8385 or online at https://mitocopper.com

Order by Phone at 888-809-8385 or online at https://www.herbanomic.com


Get our Free Ebook, "Suppressed Health Secrets"  with  Natural Cures THEY don't want you to know!

Humic & Fulvic Trace Minerals Complex - Nature's most important supplement! Vivid Dreams again!

Ultimate Clinical Potency Curcumin - Natural pain relief, reduce inflammation and so much more.

MitoCopper - Bioavailable Copper destroys pathogens and gives you more energy. (See Blood Video)
Oxy Powder - Natural Colon Cleanser!  Cleans out toxic buildup with oxygen! 
Organic Hemp Extract (CBD) - Full Spectrum high CBD (3300mg) hemp extract eases stiff joints, relieves stress and more!
Nascent Iodine - Promotes detoxification, mental focus and thyroid health.
Smart Meter Cover -  Reduces Smart Meter radiation by 96%!  (See Video)

Immusist Beverage Concentrate - Proprietary blend, formulated to reduce inflammation while hydrating and oxygenating the cells.

Report abuse
Loading...
    Loading...

    Comments

    Your Comments
    Question   Razz  Sad   Evil  Exclaim  Smile  Redface  Biggrin  Surprised  Eek   Confused   Cool  LOL   Mad   Twisted  Rolleyes   Wink  Idea  Arrow  Neutral  Cry   Mr. Green

    Total 2 comments
    • jdpent01

      These so called scientist, don’t believe the BIBLE and the creation cited!!, I God who created the Earth gave it a flood during the Pangea time era, then their time calculation is way off , Almighty God caused a world flood, killing everything off, except for eight individuals, there was no strike by a heavenly outer space event, thought it could happen, you have seen the human footprint in a Dinosaur print, yes what does this tell you? At one point in time man lived with a Dinosaur maybe even hunted them for substance,. It was during this time that giants or Nephilim were on the Earth the hybrid union of fallen angels and the daughters of men. detailed account in the book of Enoch. God can’t make mistakes or lie as then he wouldn’t be God Almighty who is Righteous and Holy in all his being. It was told in Enoch’s book these giants are everything up and had to revert to cannibalizing of people. Giants stature of 36 feet in height and 5-6 feet width, would need to eat hundreds of pounds daily of something to stay alive, yes we have had meteors and alike strike the Earth in modern times. AZ has a show ca of one Meteor creator site. Six days of creation, each a 1000, years and rested on the 7th day. Then put plants and animals on Earth then created the Light the Sun and the moon to govern seasons. JUST REMEMBER GOD CAN’T LIE AND HES RETURNING. So get you act straight with him!!!

    • jdpent01

      These so called scientist, don’t believe the BIBLE and the creation cited!!, God who created the Earth gave it a flood during the Pangea time era, then their time calculation is way off , Almighty God caused a world flood, killing everything off, except for eight individuals, there was no strike by a heavenly outer space event, though it could happen, you have seen the human footprint in a Dinosaur print, yes, what does this tell you? At one point in time man lived with a Dinosaur maybe even hunted them for substance,. It was during this time that giants or Nephilim were on the Earth the hybrid union of fallen Angels, with the daughters of men. detailed account in the book of Enoch. God can’t make mistakes or lie, as then he wouldn’t be God Almighty who is Righteous and Holy in all his being. Nephilim as told in Enoch’s book these giants ate everything up and had to revert to cannibalizing of people. Giants stature of 36 feet in height and 5-6 feet width, would need to eat hundreds of pounds daily of something to stay alive, yes we have had meteors and alike strike the Earth in modern times. AZ has a show case of one Meteor creator site. Six days of creation, each a 1000, years and rested on the 7th day. Then put plants and animals on Earth then created the Light the Sun and the moon to govern seasons. JUST REMEMBER GOD CAN’T LIE AND HES RETURNING. So get you act straight with him!!!
      Noti

    MOST RECENT
    Load more ...

    SignUp

    Login

    Newsletter

    Email this story
    Email this story

    If you really want to ban this commenter, please write down the reason:

    If you really want to disable all recommended stories, click on OK button. After that, you will be redirect to your options page.