| Period 1 | Period 2 | Num. of Period 1 | Num. of Period 2 | Legend |
| Recent | Recent | 00 | 00 | 0000 |
| Quaternary | Holocene | 01 | 01 | 0101 |
| Quaternary |
| 01 | 02 | 0102 |
| Quaternary | Pleistcene | 02 | 02 | 0202 |
|
|
| 02 | 03 | 0203 |
| Neogene | Pliocene | 03 | 03 | 0303 |
| Neogene |
| 03 | 04 | 0304 |
| Neogene | Miocene | 04 | 04 | 0404 |
|
|
| 04 | 05 | 0405 |
| Paleogene | Oligocene | 05 | 05 | 0505 |
| Paleogene |
| 05 | 06 | 0506 |
| Paleogene | Eocene | 06 | 06 | 0606 |
| Paleogene |
| 06 | 07 | 0607 |
| Paleogene | Palaeocene | 07 | 07 | 0707 |
|
|
| 07 | 08 | 0708 |
| Cretaceous | Upper Cretaceous | 08 | 08 | 0808 |
|
|
| 08 | 09 | 0809 |
| Period1 | Period 2 | Num. of Period 1 | Num. of Period 2 | Legend |
| Recent | Recent | 00 | 00 | 0000 |