It is almost certain that a major meteor impact wiped out the dinosaurs. “Almost”, because the contents of the new scientific report still cannot dismiss the theory that a volcanic eruption has permanently ended the era of giant reptiles.
Research from the UK gives them more evidence that the dinosaurs went extinct due to a large meteorite impacting the Earth, besides adding data to believe that volcanic activity helped Earth. recover after an incident with a rock from an alien.
Illustration for a giant stone hitting the Earth.
The majority of scientists supported the theory that the Chicxulub collision (a mass of meteorites about 11-81 km down in the area of the town of Chicxulub, Mexico today, caused an explosion of 11 million mega-tons) finished off the dinosaurs. The shockwave and the enormous heat it produces have catastrophic consequences for the creatures that live in the area; The rock shot up not as high as a kilometer, the tsunami struck the coast near where the meteorite hit the ground. There is even evidence that some animals that live thousands of kilometers away from the impact point die instantly.
The carbonate rock crumbles at the point of impact, releasing huge amounts of carbon into the atmosphere, immediately creating a greenhouse effect but not lasting. Ash from the collision hovered in the atmosphere for a few decades, causing the Earth to cool down and make 75% of life on Earth disappear.
Science has a huge amount of evidence supporting the hypothesis of the Chicxulub collision, a new study by British scientists that both supports it and gives us additional evidence of the important role of the collision. volcanoes in sustaining life after a disaster.
“Our research confirms that the only explanation for the extinction event is that winter comes right after the meteorite impact that wiped out dinosaurs around the world.”, Professor Alessandro Chiarenza, author of research and work at the Royal University said.
At the time of the extinction of the dinosaur, or the scientific name of the Cretaceous – Ancient Pale Extinction Event (K-Pg event), there was evidence that volcanic activity also occurred. In particular, the Deccan Trap Area in India is one of the areas created by the world’s largest erupting volcano, the Deccan eruption event occurred 66 million years ago, just before the meteorite fell into the Chicxulub region. . Because the two events are so close, it is difficult for scientists to confirm what caused the K-Pg extinction event.
Deccan trap at Ajanta cave area, Dia Do.
In a press release, Professor Chiarenza commented: “We found that the meteorite created winter for decades, and the effects they created destroyed most of the dinosaur’s habitat. On the contrary, the effect that volcanic eruptions create is not enough to disrupt the global ecosystem”.
And the professor confirms their research indicates that the giant meteorite is the most plausible explanation for dinosaurs disappearing globally.
However, there are still problems that make this assertion impossible to be a final assertion and dismiss other hypotheses. The Chicxulub collision brought into the air gas and smog, blocking the sun and changing the planet’s climate. The Deccan eruption also affected the Earth’s climate more or less, but it was before the meteorite impact and its effect lasted much longer than the impact.
There is ample evidence to suggest that both events took place, but these were both the results of the old method of research, using a climate simulation model. The new scientific report is a result of a mathematical model that incorporates weather information: for example, rainfall and temperature for different dinosaurs that can exist.
The British team used two maps to get the final result, one to determine the survival conditions after the meteorite hit the ground, and the other map to find those data, but keep an eye out for them. sue after a volcanic eruption. The results were clear: only asteroid impact could erase all potential habitat for dinosaurs, while the eruption left areas that could support life around the equator.
The map shows the impact of the collision, with red where it is possible, blue where it is unable to support life for a flightless dinosaur.
The map shows the effects of the Deccan eruption, with red where possible, blue where unable to support life for flightless dinosaurs.
But that’s not all.
There is no doubt that the immediate collision has consequences, leaving behind lasting effects such as the “impact winter” phenomenon, which is similar to the “nuclear winter. winter ”, when matter particles block sunlight, causing the Earth’s surface to freeze to death. Any creature that survives a Chicxulub collision faces extreme conditions, making it much harder for plants to photosynthesize.
But the volcano that created the Deccan Trap area is still erupting, and although volcanoes have the ability to cool the planet when the ash obscures the Sun, it also produces CO2. Over time, it is this greenhouse gas that warms the planet.
Based on these moderate factors, it can be said that the volcanic eruption helped life recover from the catastrophic collision.
“We bring new evidence that volcanic eruptions may have reduced the effect caused by meteorites, particularly to increase planet temperatures after winter collisions.”, Chief researcher of Chiarenza said.
“Warming due to the volcanic eruption has helped animals and plants recover from the extinction event, many groups of animals immediately developed, including birds and mammals.”.
The great dinosaurs were badly affected by the collision.
In the history of the Blue Planet, many extinction events have taken place and many of them volcanic eruptions are the main cause. So it’s not uncommon for researchers to assume that the Decca eruption event contributed to the K-Pg extinction event and eradicated the dinosaurs. But the evidence does not support the hypothesis, instead volcanic activity is the only thing to save life from complete destruction, helping survivors of the collision can quickly recover.
Certainly this new report is not the final conclusion of the K-Pg extinction event, nor does it convince the entire community of researchers. Many still believe that the Deccan eruption “contributed” during the extinction event, while others believe that many consecutive meteorite impacts have wiped out the dinosaurs and most of the contemporary living things. But with each of these studies appearing, there is further evidence that the Chicxulub collision is the biggest cause.
There will come a day when we will make our final judgment, just wait and see.
See Universe Today