They stood upside down. Scientists figured out when the Earth's magnetic poles first flipped

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    New study shows more precise evidence of when Earth's plate tectonics began and its surface began to change.

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    Scientists conducted a study of the most ancient rocks on the planet and proved that the earth's crust moved in the same way as modern lithospheric plates already 3.2 billion years ago. Scientists have also managed to find evidence of the earliest change in the position of the north and south magnetic poles, that is, when they switched places. The new data make it possible to understand how such geological changes could lead to the creation of a more favorable environment for the development of life on Earth, writes Phys.

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    Harvard University scientists Alec Brenner and Roger Fu have studied one of the oldest and most stable areas of the earth's crust, which is located on the territory of Australia. Scientists have come to the conclusion that some parts of the surface in the early history of the Earth moved at a speed of 6.1 centimeters per year and 0.55 degrees every million years.

    These figures are more than 2 times higher than the data obtained the same scientists before. It is plate tectonics that can explain such a speed and breadth of movements in antiquity.

    “Some scientists believe that in the early history of the Earth, plate tectonics was not the main way to release the internal heat of the planet, as it is today. But we found evidence that this actually happened already 3.2 billion years ago,” says Brenner. .

    Stand upside down. Scientists figured out when the Earth's magnetic poles first flipped

     We stood upside down. Scientists figured out when the Earth's magnetic poles first flipped

    New data show that as early as 3.2 billion years ago, the Earth had a fairly stable and strong magnetic field that could protect the planet from that its atmosphere will be destroyed by solar particle streams.

    “We believe that both plate tectonics and a stable magnetic field were already present on the early Earth, which means that they could have influenced the creation of conditions comfortable for the development of the earliest forms of life,” says Brenner.

    Today, the Earth's outer shell is made up of about 15 moving plates that hold the planet's continents and oceans together. Over millions of years, these plates moved, collided with each other, which led to the formation of continents and mountains. It also contributed to the change in the atmosphere, due to various chemical reactions, and as a result, the temperature on the planet stabilized for billions of years.

    A new study suggests that the first plate tectonics on Earth began relatively early in its history, which is 4, 5 billion years. But it is very difficult to get accurate data, because the oldest parts of the crust never appear on the surface.

    In future studies, scientists plan to focus on other parts of the ancient crust around the world. They hope to find older evidence of plate movement that resembles modern tectonics. They may also find even older evidence of magnetic pole shifts and when they reversed.

    “We have a good chance of reconstructing not only when the plates started moving, but also how they moved and The internal processes of the Earth that cause them have changed over time,” says Fu.

    As Focus wrote, scientists have found that the Earth is changing and that gravity has not finished anything yet with the surface of the planet.