Q7.19 Labels for the four paleomagnetic
epochs extending back to 4 million years BP
(Fig. 7.29) bear the names of notable scientists.
What did these four particular scientists have 60-
in common? Hint: All four of these men have
been mentioned in this exercise.

Respuesta :

The term "normal polarity" refers to the magnetic minerals in a rock having the same polarity as the current magnetic field of the Earth.

the "compass needle" of the rock is pointing in the same northerly direction as the current magnetic north). Although it has been more than twice that long since the previous reversal, Earth has settled into a pattern of pole reversals every 200,000–300,000 years over the past 20 million years. A reversal does not exactly include a flawless backflip; it takes place over hundreds or thousands of years. You can have "normal" or "reversed" polarity. In a normal polarity, the magnetic north (approximately) points in the direction of the geographic north pole. The magnetic field is currently arranged in this manner. Reversed The magnetic field's north end is near to the current south pole, and its polarity is in the opposite direction.

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