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Active volcanoes have caused dinosaurs to go extinct, not meteors as we thought before.

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10,000 years ago, lava flows from Deccan Traps, a volcanic region near Mumbai, present-day India, released large amounts of sulfur and carbon dioxide into the air, causing catastrophic destruction by heating the earth. up and the ocean acidified.

This discovery, presented at the annual meeting of the American Geophysical Society, contributes to the voice and debate that lasted about the cause of the extinction of dinosaurs 65 million years ago.

Previous Alvarez theory that a large asteroid fell on Chicxulub, Mexico, about 65 million years ago, released a large amount of dust and toxic gas into the air, covering the sun, making the earth cold Price, destroy dinosaurs and poison sea creatures. Collisions can also cause active volcanoes, earthquakes and tsunamis.

In 2009, oil and gas companies while drilling off the east coast of India discovered a layer of lava sediment dating back several millennia, lying 3.3km below sea level.

Gerta Keller, a geologist at Princeton University, USA and her colleagues discovered the sediment containing many fossils of the K-T Boundary period, when the dinosaurs disappeared. This sediment contains layers of lava from the Deccan Traps area.

According to the fossil analysis, the number of plankton is less, the smaller, the number of animal shells remaining on the lava layer is also less. This shows that the organism had to change after the volcano was active. Most creatures slowly die off. There is only one type of plankton, called Guemnilitria — that is found in abundance in fossils.

Guembilitria may be the most common organism in the world when large amounts of sulfur gas spread in seawater. This gas can bind with calcium, making it impossible for marine organisms to use calcium to synthesize shells and bones.

At the same time, the fossil record in India also showed that a large number of trees and animals on the ground had disappeared. This shows that it was the volcanoes that caused or perished on both land and at sea.

The team also found evidence that raised suspicions about the theory that asteroids hitting the earth caused extinction.
“A meteor crash could not produce enough sulfur and carbon dioxide that we can observe on the rocks, so a meteor strike could only make genocide worse. is not the cause of this disaster “- Ms. Keller said.

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