Earth Was In Stress before Extinction of Dinosaurs
Editorials News | Dec-15-2019
New evidence has gleaned from the continent of Antarctic seashells which confirms that our Earth was already in the unstable state before the impact of asteroid that has wiped out the dinosaurs.
The study which was led by researchers from North western University is the person who is first for measuring the calcium isotope composition from fossilized clam and snail shells, which are resulted to date back to the Cretaceous-Paleogene event of mass extinction. The researchers have found that the shells' chemistry is shifted in response of a surge of carbon inside the oceans.
This carbon influx was majorly due to long-term eruptions which werefrom the Deccan Traps that is a 200,000-square-mile volcanic province which is located in India. During some years leading up to the asteroid impact, the Deccan Traps has spewed up massive amounts of carbon dioxide (CO2) into our atmosphere. The concentration of CO2 was acid for the oceans that directly affected the organisms living there.
Benjamin Linzmeier who is the study's first author said that their data suggested that the environment was changing before the asteroid impact; she also added that those were the changes that appear for correlating with the eruption of the Deccan Traps.
Andrew D. Jacobson who is a senior author of the paper said that the Earth was clearly seen under stress before the mass extinction event. He further added that the asteroid impacts coincide with pre-existing carbon cycle instability but it doesn't mean that they have answers to what is actually the cause of the extinction.
By: Prerana Sharma
Content: https://www.sciencedaily.com/releases/2019/12/191211145632.htm
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