Friday , August 19 2022

Two new studies question whether dinosaurs have been switched off by asteroid – 02/21/2019



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Scientists from Princeton and California universities in Berkeley (USA) have found, in two independent studies, evidence suspects that the disappearance of dinosaurs is caused by the effect of a meteorite in the Gulf of Mexico, as it was believed so far.

Both inquiries, published this Thursday in the Science magazine, agree that a series of Large volcanic battles in the Decacan Trap, in the mid west of India, before the event associated with the cataclysm that ended with two-thirds of living species that lived in the Earth 66 million years ago.

Volcanic activity may have started about 50,000 years ago from the asteroid collision or a great trap that caused the Chicxulub crater in the current Yucatan Peninsula, and the lava flows continued for thousands of years later. The proximity of these two periods of time means that, from a geological perspective, they are simultaneous. Based on a date of more accurate dates, researchers collect that the huge cuts of Indian volcanoes they also had a significant impact in the mass damage of species. Now we need to decide the extent to which each factor contributes.

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The key to understanding understanding of the disappearance of dinosaurs, one of the largest events studied in the history of the planet, is to understand the chronology of events associated with the hecatom. If the majority of the Deccan Trap slip trucks had come to the surface of the Earth before the effect of the meteorite, the gases emitted during the cuts could be the case of global warming. The last 400,000 years of the Cretaceous.

During this warming period, live beings had evolved to adapt to the effect of a greenhouse. However, the vast amounts of magma and gases released by the volcanoes have fallen to the atmosphere, blocking sunlight and cooling the weather. The lack of light and sun heat would have been a shock that most species did not survive. According to this theory, defended by Blair Schoene, Professor of Geosciences in Princeton, there would be no correlation between the effect of the meteorite in the Caribbean Sea and the disappearance of dinosaurs.

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The study led by Courtney Sprain, a former PhD student in Berkeley and a post-doctoral researcher at Liverpool University, places less emphasis on the power of stimulating volcanic activity, but agrees the analysis of the environmental effects of the explosions.

There is another point where both scientific teams agree: studying the causes of mass spreads in life's history on Earth is relevant to understanding, spreading and prevent the consequences of climate change which is only driven by human action only.

DD

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