The various ice ages that have affected the planet were not caused by the atmosphere but by the tectonic plates.
Obviously, the last three ice-skates that hit the Earth at 540 million years, the last 21,000 years ago, have not originated only through large volcanic eruptions, which are commonly thought of, but they would basically originate from shocks at the level of tectonic plates in the earth. equator. All this has been known thanks to a new study published in Science by researchers of University of California and Santa Barbara.
For experts, the three ice ages that influenced the planet preceded the collision of giant plates or "continental arc" that accumulated over time and emerged specifically in the planet's tropical zone. These periods had devastating consequences for the earth, as they were responsible for massive extinction and the overall change of the ecosystem at atmospheric level, which followed the increase in its carbon dioxide content.
Generally, it was believed that volcanic events can be the main sources of carbon dioxide emissions, but researchers have found an inverse form that can also cause this process and have caused the ice age.
How is an Ice Age Produced?
As the slides slide beneath the ground and collide with each other, they bury more amounts of carbon absorbed from the surface, causing more time and the presence of new tectonic shocks, more healthy stones rising to the crust, and following absorbing larger amounts of the element through various carbonates such as limestone. This process is much more likely to occur in the tropics because the temperature is higher and the rainfall draws rocks from the surface.
According to experts, oceanic tectonic plates collided with the tropics with continental plates, leading to more silicate rocks rising to the surface and absorbing larger amounts of carbon in the form of a solid. After the seismic events that have been added to the high temperatures in the tropics, they begin to release carbon dioxide. With part of millions of years, the process led to the temperature of the atmosphere falling sharply and the glaciers were liberated from the poles and released the ice age.
To relate all this, the scientists saw the movements in two flat suture areas where the area was off The Himalayas. Although this mountainous village is more north of the equator than the Earth, it was actually formed 80 million years ago, when the Godwana continent moved north and caused much of the earth's mass to collide with the earth. The Eurasian area, which produces the first of the geological sutures. The other took place about 50 million years ago, and completed the formation of the Indian mountain range
In summary, the experts discovered that what happened in the area was that both sutures occurred in tropical zones and could have been triggered by carbon dioxide emissions from the earth's mantle to cool the atmosphere and cause the ice age on earth.