What serves as a natural "tape recording" of the history of the Earth's magnetic field reversals?

ocean floor
antarctic ice cap
coal deposits
Himalayas
In 1950s sci­en­tists dis­cov­ered ze­bra-­like pattern of the ocean floor magnetic po­lar­i­ty. It turned out that stripes of rock parallel to the mid-o­cean ridge crest al­ter­nate in magnetic polarity (nor­mal-re­versed-nor­mal, etc.), sug­gest­ing that they were formed during dif­fer­ent epochs doc­u­ment­ing the normal and reversal episodes of the Earth's magnetic field.

Answers distribution

ocean floor
antarctic ice cap
coal deposits
Himalayas
answers
flagthe United Arab Emirates
80%
7%
3%
3%
26
flagItaly
79%
6%
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93
flagSweden
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13%
6%
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43
flagBelgium
69%
26%
0%
3%
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flagGreece
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flagthe United Kingdom
63%
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5%
544
flagthe Netherlands
62%
14%
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flagGermany
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19%
10%
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200
flagCanada
60%
15%
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flagDenmark
59%
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flagFrance
58%
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48
flagPoland
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flagRepublic of Ireland
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flagSpain
51%
32%
9%
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31
flagthe United States
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569
flagAustria
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22
flagIndia
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flagUnknown
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flagAustralia
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flagNorway
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Gender

men47%
women55%
ocean floor
47%
55%
antarctic ice cap
30%
19%
coal deposits
15%
17%
Himalayas
7%
8%

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What serves as a natural "tape recording" of the history of the Earth's magnetic field reversals?
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Author: globalquiz.org
Illustration: NASA Goddard
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