FP Trends02 Jun, 2020 14:48:49 IST
New research has produced surprising information about the mass extinction that occurred 215 million years ago.
It has long been believed that some strong changes – a series of violent volcanic eruptions, climate changes or asteroids or comets – are wiped out around 90 percent of the Earth type in the Triassic period but a recent study shows the reality, in fact, is slightly different.
Researchers from the University of Rhode Island (URI) were conducted complex quantitative analysis of mass extinctions and found that the loss of many species does not happen “suddenly or simultaneously”. This has now led to the negation of the previous theory that mass extinctions were somehow related to a single catastrophic event.
A team of scientists and statisticians carried out paleontological field research in deposits of 227 to 205 million years in the Petrified Forest National Park in Arizona.
This the global extinction of Ancient Triassic vertebrates it has never been reconstructed “satisfactorily,” said David Fastovsky, URI Geoscience professor whose graduate student Reilly Hayes led the research. “The previous hypothesis seems very vague because no one has ever approached this problem – or the problem of ancient mass extinctions – in a quantitative way that we did,” he claims..
This mass extinction is referred to as Adamanian-Revueltian turnover, which saw “a decrease in diversity among crocodylian line archosaurs and the extinction of several taxa (groups of one or more populations)”. This has happened at the same time as “the appearance or improvement of other abundant taxa”.
“In the end, we conclude that neither the impact of the asteroid nor the climate change has anything to do with extinction and that extinction is certainly not as described – suddenly and simultaneously. In fact, it is diachronic and protracted, “Fastovsky concluded.
A statement from the university stated that “the impact of the asteroid occurred 215.5 million years ago and the climate changed about three to five million years later.” Researchers have shown that the extinction of this species occurred in a long period between 222 million and 212 million years ago.
The results of this study have been published in the April issue of the journal Geology.
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