Magnetic Polarity Time Scale
| Geologic Period |
Anomaly # |
Age, Ma |
|
Quaternary |
1 |
0 |
|
|
} 2 { |
|
2 |
|
Pliocene |
} 3 { |
3 |
|
|
|
|
5 |
|
|
} 4 { |
7 |
|
|
Miocene |
5 |
10 |
|
|
|
|
15 |
|
|
|
6 |
20 |
|
|
|
|
25 |
|
|
} 7 { |
26 |
|
|
|
9 |
30 |
|
|
Oligocene |
}10,12{ |
31,34 |
|
|
|
|
35 |
|
|
|
13 |
37 |
|
|
} 15 { |
|
38 |
|
|
16 |
40 |
|
|
Eocene |
20 |
45 |
|
|
|
22 |
50 |
|
|
|
} 24 { |
53 |
|
|
|
|
55 |
|
|
}25,26{ |
56,58 |
|
|
Paleocene |
|
60 |
|
|
|
} 27 { |
61 |
|
|
} 29 { |
|
65 |
|
|
}30,31{ |
66,67 |
|
|
|
|
70 |
|
|
|
} 32 { |
71 |
|
|
|
|
75 |
|
|
Late Cretaceous |
} 33 { |
79 |
|
|
|
|
80 |
|
|
|
34 |
83 |
|
|
|
{} |
|
|
|
|
Cretaceous Quiet Zone |
85, 90, 95 |
|
|
|
|
98 |
|
|
Cretaceous Quiet Zone |
100 |
|
|
|
{} |
105, 110, 115 |
|
|
|
} M-0 { |
119 |
|
|
|
|
120 |
|
|
|
} M-1 { |
123 |
|
|
Early Cretaceous |
M-3 |
125 |
|
|
|
} M-5 { |
128 |
|
|
|
|
130 |
|
|
|
} M-10 { |
132 |
|
|
|
M-11 |
135 |
|
|
|
M-14 |
140 |
|
|
|
} M-15 { |
142 |
|
|
|
|
144 |
|
|
M-16 |
145 |
|
|
Late Jurassic |
M-19 |
150 |
|
|
|
M-21 |
155 |
|
|
|
M-25 |
160 |
|
|
|
|
163 |
|
Middle Jurassic |
M-29 |
165 |
|
|
|
Jurassic Quiet Zone |
|
|
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