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5 July, 06:00

Did earth experience normal or reverse polarity 1.5 million years ago

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  1. 5 July, 06:12
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    Normal polarity

    Explanation:

    Earth's magnetic field used to be twice as strong 1.5 billion years ago as it is today and Earth's temperature other than what the geologists see from the 'normal' pattern. It has been noticed that some volcanic rocks were magnetized in opposite direction to the direction of the local Earth's field. It is clear that the Earth has experienced the normal polarity 1.5 years ago but at that time, the Earth's polarity was poorly understood.
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