Magnetic Reversal Sequence (MRS)
Definition - What does Magnetic Reversal Sequence (MRS) mean?
Magnetic Reversal Sequence is the periodic switching of the earth's magnetic south and north poles, possibly due to the result of the movement of fluids within the core of the Earth. The duration and onset of various episodes of the reversed polarity are documented by exploring the polarity of magnetic minerals. The magnetic materials are within the rocks of distinct ages from all over the world, notably in the igneous rocks or the basalts of the oceanic crust.
Petropedia explains Magnetic Reversal Sequence (MRS)
The Magnetic Reversal Sequence occurs as a change in the earth's magnetic field that results in the switching of the north and south poles in a way that magnetic south is aligned with the geographic north and magnetic north is aligned with the geographical south. The oceanic basalts record the magnetic field of the Earth while they solidify from the molten lava uniformly on the mid-oceanic ridges. This data is compiled to create a time scale called geomagnetic polarity time scale. The wellbore recordings allow the direct correlation to geomagnetic polarity time scale and well-to-well correlations.
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