| Era | Okres | Mln lat temu | % Poprawnych |
|---|---|---|---|
| mezozoik | jura | 201 - 145 | 97%
|
| mezozoik | kreda | 145 - 66 | 97%
|
| mezozoik | trias | 252 - 201 | 91%
|
| paleozoik | kambr | 541 - 485 | 88%
|
| kenozoik | czwartorzęd | 2,6 - dziś | 85%
|
| paleozoik | karbon | 359 - 299 | 85%
|
| prekambr | 4600 - 541 | 83%
| |
| paleozoik | perm | 299 - 252 | 82%
|
| paleozoik | dewon | 419 - 359 | 81%
|
| paleozoik | sylur | 445 - 419 | 81%
|
| paleozoik | ordowik | 485 - 445 | 76%
|
| kenozoik | neogen | 23 - 2,6 | 74%
|
| kenozoik | paleogen | 66 - 23 | 73%
|