| Similarity | Rank | |
|---|---|---|
| permian | 0.909 | 18568 |
| ordovician | 0.901 | 22032 |
| metamorphic | 0.878 | 30217 |
| precambrian | 0.874 | 28924 |
| triassic | 0.870 | 19513 |
| devonian | 0.870 | 17422 |
| silurian | 0.865 | 24411 |
| dalradian | 0.864 | 31062 |
| greywacke | 0.864 | 72592 |
| mesozoic | 0.864 | 21369 |
| carboniferous | 0.860 | 10443 |
| namurian | 0.859 | 53188 |
| glaciation | 0.856 | 30769 |
| pleistocene | 0.855 | 19850 |
| proterozoic | 0.854 | 68404 |
| sedimentary | 0.848 | 16591 |
| fossiliferous | 0.846 | 85110 |
| cretaceous | 0.846 | 15845 |
| stratiform | 0.845 | 79354 |
| chert | 0.842 | 49404 |
| facies | 0.841 | 23456 |
| dinantian | 0.840 | 48032 |
| metasediment | 0.838 | 45948 |
| metamorphism | 0.836 | 50754 |
| igneous | 0.836 | 20899 |