List of geomagnetic reversals
List of geomagnetic the beginning and end of geomagnetic reversals. The ages of the beginning and end of each period of normal (same as present) polarity are listed.
Source for the last 83 million years: Cande and Kent, 1995 [1]
Ages in million years before present (Ma).
End/Top (Ma) | Beginning/Base (Ma) | Normal polarity | Name |
0.000 | 0.780 | 1n | Brunhes/Matuyama |
0.990 | 1.070 | 1r.1n | Jaramillo |
1.770 | 1.950 | 2n | Olduvai |
2.140 | 2.150 | 2r.1n | |
2.581 | 3.040 | 2An.1n | Matuyama/Gauss |
3.110 | 3.220 | 2An.2n | |
3.330 | 3.580 | 2An.3n | Gauss/Gilbert |
4.180 | 4.290 | 3n.1n | Cochiti |
4.480 | 4.620 | 3n.2n | Nunivak |
4.800 | 4.890 | 3n.3n | Sidufjall |
4.980 | 5.230 | 3n.4n | Thvera |
5.894 | 6.137 | 3An.1n | |
6.269 | 6.567 | 3An.2n | |
6.935 | 7.091 | 3Bn | |
7.135 | 7.170 | 3Br.1n | |
7.341 | 7.375 | 3Br.2n | |
7.432 | 7.562 | 4n.1n | |
7.650 | 8.072 | 4n.2n | |
8.225 | 8.257 | 4r.1n | |
8.699 | 9.025 | 4An | |
9.230 | 9.308 | 4Ar.1n | |
9.580 | 9.642 | 4Ar.2n | |
9.740 | 9.880 | 5n.1n | |
9.920 | 10.949 | 5n.2n | |
11.052 | 11.099 | 5r.1n | |
11.476 | 11.531 | 5r.2n | |
11.935 | 12.078 | 5An.1n | |
12.184 | 12.401 | 5An.2n | |
12.678 | 12.708 | 5Ar.1n | |
12.775 | 12.819 | 5Ar.2n | |
12.991 | 13.139 | 5AAn | |
13.302 | 13.510 | 5ABn | |
13.703 | 14.076 | 5ACn | |
14.178 | 14.612 | 5ADn | |
14.800 | 14.888 | 5Bn.1n | |
15.034 | 15.155 | 5Bn.2n | |
16.014 | 16.293 | 5Cn.1n | |
16.327 | 16.488 | 5Cn.2n | |
16.556 | 16.726 | 5Cn.3n | |
17.277 | 17.615 | 5Dn | |
18.281 | 18.781 | 5En | |
19.048 | 20.131 | 6n | |
20.518 | 20.725 | 6An.1n | |
20.996 | 21.320 | 6An.2n | |
21.768 | 21.859 | 6AAn | |
22.151 | 22.248 | 6AAr.1n | |
22.459 | 22.493 | 6AAr.2n | |
22.588 | 22.750 | 6Bn.1n | |
22.804 | 23.069 | 6Bn.2n | |
23.353 | 23.535 | 6Cn.1n | |
23.677 | 23.800 | 6Cn.2n | |
23.999 | 24.118 | 6Cn.3n | |
24.730 | 24.781 | 7n.1n | |
24.835 | 25.183 | 7n.2n | |
25.496 | 25.648 | 7An | |
25.823 | 25.951 | 8n.1n | |
25.992 | 26.554 | 8n.2n | |
27.027 | 27.972 | 9n | |
28.283 | 28.512 | 10n.1n | |
28.578 | 28.745 | 10n.2n | |
29.401 | 29.662 | 11n.1n | |
29.765 | 30.098 | 11n.2n | |
30.479 | 30.939 | 12n | |
33.058 | 33.545 | 13n | |
34.655 | 34.940 | 15n | |
35.343 | 35.526 | 16n.1n | |
35.685 | 36.341 | 16n.2n | |
36.618 | 37.473 | 17n.1n | |
37.604 | 37.848 | 17n.2n | |
37.920 | 38.113 | 17n.3n | |
38.426 | 39.552 | 18n.1n | |
39.631 | 40.130 | 18n.2n | |
41.257 | 41.521 | 19n | |
42.536 | 43.789 | 20n | |
46.264 | 47.906 | 21n | |
49.037 | 49.714 | 22n | |
50.778 | 50.946 | 23n.1n | |
51.047 | 51.743 | 23n.2n | |
52.364 | 52.663 | 24n.1n | |
52.757 | 52.801 | 24n.2n | |
52.903 | 53.347 | 24n.3n | |
55.904 | 56.391 | 25n | |
57.554 | 57.911 | 26n | |
60.920 | 61.276 | 27n | |
62.499 | 63.634 | 28n | |
63.976 | 64.745 | 29n | |
65.578 | 67.610 | 30n | |
67.735 | 68.737 | 31n | |
71.071 | 71.338 | 32n.1n | |
71.587 | 73.004 | 32n.2n | |
73.291 | 73.374 | 32r.1n | |
73.619 | 79.075 | 33n | |
83.000 | 118.000 | 34n |
References
- ↑ Cande, S.C., and D.V. Kent, Revised calibration of the geomagnetic polarity timescale for the late Cretaceous and Cenozoic, J. Geophys. Res., 100, 6,093-6,095, 1995.
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