Almost 350 million years ago, something strange happened to the Earth’s magnetic field. Scientists suggest that it was
Devonian period (420–360 million years ago) long agointrigues scientists. One of its biggest mysteries is why the rocks of that time show no trace of the Earth's magnetic field. For a long time, scientists assumed that this was because the rocks had somehow lost their "magnetic memory" " In a new study, geologists suggested that heating from the collision of continents reset it.
Scientists conducted a study of paleointensityvolcanic rocks. They confirmed that the magnetic field was much weaker than today. As a result, the researchers suggested that this was accompanied by changes in polarity.
The scientists collected samples from the Middle and Upper Devonian in Germany, Poland and Canada that show low conodont change indices, indicating low thermal maturity.
The Earth's magnetic field plays an important role in everyday life. It protects the atmosphere and planet from solar storms, which consists of charged particles that are dangerous to modern technology.
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