| |||
| 极性倒转年表; 极性年表 | |||
|
polarity time scale : 11 phrases in 4 subjects |
| Earth sciences | 6 |
| Geophysics | 1 |
| Oil / petroleum | 3 |
| Technology | 1 |
| |||
| 极性倒转年表; 极性年表 | |||
|
polarity time scale : 11 phrases in 4 subjects |
| Earth sciences | 6 |
| Geophysics | 1 |
| Oil / petroleum | 3 |
| Technology | 1 |