| Similarity | Rank | |
|---|---|---|
| oligocene | 0.921 | 52381 |
| silurian | 0.899 | 24411 |
| miocene | 0.895 | 31987 |
| cretaceous | 0.889 | 15845 |
| mesozoic | 0.878 | 21369 |
| devonian | 0.878 | 17422 |
| pliocene | 0.875 | 49115 |
| permian | 0.872 | 18568 |
| cenozoic | 0.871 | 76640 |
| unconformably | 0.871 | 99989 |
| triassic | 0.869 | 19513 |
| glaciate | 0.864 | 54958 |
| precambrian | 0.864 | 28924 |
| pleistocene | 0.863 | 19850 |
| ordovician | 0.862 | 22032 |
| neogene | 0.861 | 76982 |
| proterozoic | 0.861 | 68404 |
| chert | 0.861 | 49404 |
| archaean | 0.861 | 68387 |
| andesitic | 0.859 | 76635 |
| tectonised | 0.858 | 99784 |
| glossopteris | 0.858 | 77276 |
| dinantian | 0.858 | 48032 |
| echinoid | 0.856 | 92778 |
| glauconitic | 0.853 | 88526 |