Dinosaurs killed not a meteorite, and the magnetic field of the Earth. This opinion was expressed at the Institute of Physics of the Earth RAS Vladimir Pavlov, investigating the behavior of the Earth‘s field.
«In the course of our investigations it was found that the largest mass extinctions followed by 20-30 million years after it was completed superchron» — said Pavlov. Superchron called time interval, when the orientation of the geomagnetic field of the planet is not changed — there is no inversion, that is changing the Earth‘s poles. Such superchrons in the history of the planet yet found three, and after each of them in the world event of a mass tragedy: for example, during the so-called «Permian catastrophe» died, according to various estimates, from 75 to 90 percent of the species of living beings.
According to geologists, inversion — the result of instabilities in the flow in the outer part of the Earth’s core. First, the reversal frequency is approached superchron decreases, then the poles are frozen in a stable state, and then the stability of literally explodes when the magnetic field «jumps». As a result, there are accidents in the world, in particular, rapidly activated volcanoes.
ITAR-TASS news agency, according to the researchers, this is because between the core and the mantle is growing a layer, something like a cake. Once this crust exceeds some critical value, and breaks. After that, the temperature increases the mantle and its activity is splashed in the form of massive geological and geomagnetic processes. At the same ends and superchron.
At the present time, the Earth is experiencing a period of constant geomagnetic field. This period lasted for 780,000 years.
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