Discussion
The current geomagnetic polarity is named as :
Answer: D
The present polarity interval is the Brunhes Normal chron.
The earth's magnetic field has reversed many times. The current interval of normal polarity, the Brunhes chron, began about 780,000 years ago at the Brunhes-Matuyama reversal. It is named after Bernard Brunhes, who first found reversely magnetised rocks.
Before it came the Matuyama reversed chron, which was mostly reversed, not normal, and before that the Gauss normal and the Gilbert reversed chrons, both older than about 2.6 million years. None of these is the current polarity.
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