| Similarity | Rank | |
|---|---|---|
| eocene | 0.895 | 39949 |
| pliocene | 0.892 | 49115 |
| permian | 0.886 | 18568 |
| oligocene | 0.874 | 52381 |
| silurian | 0.873 | 24411 |
| pleistocene | 0.867 | 19850 |
| cretaceous | 0.866 | 15845 |
| ordovician | 0.852 | 22032 |
| proterozoic | 0.850 | 68404 |
| archaean | 0.848 | 68387 |
| precambrian | 0.846 | 28924 |
| triassic | 0.846 | 19513 |
| mesozoic | 0.841 | 21369 |
| gondwana | 0.837 | 53971 |
| palaeozoic | 0.832 | 17635 |
| devonian | 0.831 | 17422 |
| kenyapithecus | 0.831 | 68729 |
| cenozoic | 0.828 | 76640 |
| karoo | 0.828 | 69420 |
| glaciation | 0.827 | 30769 |
| glossopteris | 0.825 | 77276 |
| neogene | 0.825 | 76982 |
| cainozoic | 0.819 | 58574 |
| refugium | 0.818 | 66085 |
| trias | 0.815 | 57767 |