Thursday, October 21, 2021 16:30 PM (GMT+7)
The Earth’s crust is not really attached to the two inner core layers, has been tilted during the Cretaceous period like a loose ball, and is still struggling to find a way to self-correct.
According to the Daily Mail, the discovery comes from ancient limestone slabs in the Apennine Mountains of Italy, where microscopic magnetic particles in the rock reveal that the Earth’s magnetic poles used to be very tilted, and to the present. Still can’t find the way back to the original location.
The true North Pole of the Earth (circles) has been running around for the past 84 million years and will last at least another 5 million years – Photo: NATURE
Research led by geologist Joe Krischvink from the University of Tokyo’s Earth Life Sciences Institute (ELSI) shows that 84 million years ago, the Earth’s crust and mantle were displaced from the core, causing the North Pole to “run” quite a distance to the South, the planet’s axis is tilted 12 degrees. It was in the Cretaceous period, when dinosaurs roamed the continents.
The interesting part doesn’t stop there: during the time since then, the Earth has “struggling” to find its way back to its old position, sometimes rotating back up to… 25 degrees. So for 84 million years, the North Pole and the South Pole have really “run around” over a large area. According to calculations, it will take another 5 million years for our planet to adjust itself to its original position.
Ancient stone slabs in Italy have also provided clear data about the Earth’s tilts
Dr. Krischvink explains that the Earth’s layers are not as closely linked as we once thought. The planetary core consists of a solid metal inner core and a molten outer core. It is this molten core that makes the outer “mantle” loose, easily slips away and rotates inhomogeneously with the core.
According to an earlier preliminary report in Nature, when this international team had just identified the first 12-degree tilt, the cause of this whirling, shell splitting was due to plate tectonics. abrupt changes in the distribution of planetary weights.
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