This conclusion was reached by a group of researchers led by an employee of the Institute of Physics of the Earth of the Russian Academy of Sciences Vladimir Pavlov, the scientist himself said in a report to the Presidium of the Russian Academy of Sciences
According to Pavlov's report, it was established that the largest mass extinctions of living beings followed 20-30 million years after the end of the superchron. Superchron is the time interval when the orientation of the geomagnetic field of the planet does not change - there is no inversion, i.e. change of the earth's poles, explains ITAR-TASS.
Scientists consider this phenomenon to be one of the brightest and most mysterious phenomena of the geomagnetic field. It is known that there are no regularities in the change of the poles: for example, over a million years the poles sometimes change 5-6 times, at the same time there are periods when the poles freeze for tens of millions of years in one of two possible stationary states.
According to scientists, there were three such superchrons in the history of the Earth. Each time they were accompanied by the death of living beings. For example, during the so-called "Permian catastrophe", according to various estimates, from 75% to 90% of the inhabitants of the Earth became extinct.
The regularities of the behavior of the magnetic field are not yet clear to scientists. As the geological data show, inversions are the result of instabilities in the currents system in the outer part of the earth's core. First, the frequency of reversals decreases when approaching the superchron, then the poles freeze in a stable state. After which the stability seems to explode. At such moments, natural disasters occur on Earth - for example, volcanoes begin to erupt.
According to the researchers, the reason for this instability is the growth of the layer between the core and the mantle. After this layer exceeds the critical value, it breaks. After that, the temperature of the mantle increases, and its activity manifests itself in the form of massive geological and geomagnetic processes. This marks the end of the Super Chone.
Data on these interesting phenomena were obtained by studying the nature of rocks that have a "magnetic memory". According to scientists, now the Earth is in a period of constant geomagnetic field. It has been going on for 780 thousand years. As scientists note, since superchrons occur every 150-170 million years, the next mass extinction of living beings should be expected no earlier than in 80-100 million years.
Recall that, according to the main version, the dinosaurs became extinct as a result of the collision of the Earth with an asteroid. This happened, presumably, in the Cretaceous period, which ended 70 million years ago. Last year, scientists concluded that the meteorite that caused the extinction of the dinosaurs 65 million years ago could have fallen near the Indian metropolis of Mumbai (formerly Bombay). Earlier it was assumed that a killer meteorite fell on the Mexican Yucatan Peninsula and in its place formed a crater with a diameter of 10 kilometers.
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In 2008, an international team of scientists from the United States, Great Britain and Italy concluded that one of the reasons for the extinction of the dinosaurs was the explosion of a colossal oil reservoir.
In the same year, another version of the death of dinosaurs was put forward. British scientists have come to the conclusion that the unresponsive dinosaurs died from infections. Huge animals were killed by carriers of infections - ticks, nematodes and stinging flies.
