| |||
| Pleistocene-Holocene; post-tertiary; quaternary; recent | |||
| fourth | |||
|
quaternario : 36 phrases in 9 subjects |
| Agriculture | 8 |
| Chemistry | 1 |
| Communications | 3 |
| Construction | 2 |
| Earth sciences | 2 |
| Economics | 1 |
| Electronics | 16 |
| Information technology | 1 |
| Power lines | 2 |