The average length of a period during which a given magnetic field polarity exists is about
A)1 000 years.
B)500 000 years.
C)400 million years.
D)1 billion years.
E)4)6 billion years.

Name: The average length of a period during which a given magnetic field polarity exists is about A)1 000 years. B)500 000 years. C)400 million years. D)1 billion years. E)4)6 billion years.
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Question

Quizplus · Accepted Answer

The average duration of a magnetic field polarity, known as a geomagnetic reversal, is approximately 500,000 years.

The Average Length of a Period During Which a Given