| Ouderdom (in miljoen jaar) | periode | % Correct |
|---|---|---|
| 144-66 | krijt | 97%
|
| 208-144 | jura | 90%
|
| 570-505 | cambrium | 77%
|
| 360-286 | carboon | 77%
|
| 245-208 | trias | 77%
|
| 4600-570 | precambrium | 73%
|
| 408-360 | devoon | 70%
|
| 2-0 | kwartair | 70%
|
| 505-438 | ordovicium | 70%
|
| 286-245 | perm | 70%
|
| 438-408 | siluur | 70%
|
| 10.000 jaar- 0 | holoceen | 63%
|
| 2,5-0 | pleistoceen | 57%
|
| 66-2 | tertiair | 43%
|