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

Volcanic Activity Ruled Out as Cause of Dinosaur Extinction, An Asteroid Did It

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

Sixty-six million years ago – at the Cretaceous–Paleogene boundary – nearly three-quarters of all animal species died out, including the dinosaurs. The cause for this has fuelled controversy among scientists for decades. The latest research from an international research team indicates that an asteroid strike was the sole driver of the mass extinction and that volcanic activity did not play a role, even though it certainly had an impact on the climate and the biosphere. Geoscientists from Heidelberg University were significantly involved in the investigations.An artist’s depiction of the asteroid impact 66 million years ago that many scientists say is the most direct cause of the dinosaurs’ disappearance
Credit:  NASA
The mass extinction at the end of the Cretaceous period was the most recent of five major events of this type in the Earth’s history. As Heidelberg geoscientist Prof. Dr Oliver Friedrich explains, there are two possible scenarios that are likely causes – an asteroid strike off Mexico’s Yucatán Peninsula, the consequences of which are still visible today in the form of a 200-km-wide crater, or massive volcanic eruptions over a longer geological period in the Deccan region of Southern India. A 36-member research team led by Prof. Dr Pincelli M. Hull of Yale University (USA) and PD Dr André Bornemann of the Federal Institute for Geosciences and Natural Resources (BGR) has now studied the impact of the Deccan volcanism using a variety of geochemical and micropalaeontological methods.

They analysed deep-sea drill cores obtained from the North and South Atlantic as well as the Pacific, covering the Cretaceous-Paleogene boundary period. The palaeontological data garnered from the sediment samples and reconstructed temperature changes were compared with the results of carbon cycle models to reveal a possible fingerprint of the Deccan volcanism and to precisely date the phases of volcanic activity. Researchers at the Institute of Earth Sciences at Heidelberg University were tasked with measuring stable oxygen and carbon isotope ratios to verify changes in temperature and in the carbon cycle in the North Atlantic.

The researchers have analysed deep-sea drill cores obtained from the North and South Atlantic as well as the Pacific.
 | © Heidelberg University

The results of the investigations proved that the changes in the marine environment at the Cretaceous-Paleogene boundary could not have come from volcanic activity. The research showed that at least half of the gas emissions, primarily CO, that came from volcanic activity in the Deccan region occurred in the Upper Cretaceous and were responsible for a brief warming event 200,000 years before the Cretaceous-Paleogene boundary, but they did not cause the mass extinction 66 million years ago. The changes in the carbon cycle connected with the volcanic activity and the changes in the marine temperatures chronologically occurred before the mass extinction, as Prof. Friedrich explains.

The findings from the research team of Prof. Hull and Dr Bornemann support the assumption that an asteroid strike was the sole cause of the mass extinction of animal species. The research results also show that volcanic eruptions certainly affected the climate and the biosphere both before and after the mass extinction, such as in the form of short-term temperature changes.

Prof. Friedrich directs the Sedimentology and Marine Paleoenvironmental Dynamics Research Group at the Institute of Earth Sciences at Heidelberg University. The research work was funded by the German Research Foundation (DFG).

Contacts and sources:
Heidelberg University

Publication: On impact and volcanism across the Cretaceous-Paleogene boundary. P. M. Hull, A. Bornemann et al.: Science 17 Jan 2020: Vol. 367, Issue 6475, pp. 266-272 doi: 10.1126/science.aay5055

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

Order by Phone at 888-809-8385 or online at

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


    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

    Load more ...




    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.