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:
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
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.
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)