| Similarity | Rank | |
|---|---|---|
| permian | 0.870 | 18568 |
| triassic | 0.869 | 19513 |
| palaeozoic | 0.860 | 17635 |
| ordovician | 0.859 | 22032 |
| devonian | 0.854 | 17422 |
| cretaceous | 0.849 | 15845 |
| silurian | 0.845 | 24411 |
| mesozoic | 0.835 | 21369 |
| dalradian | 0.834 | 31062 |
| namurian | 0.832 | 53188 |
| greywacke | 0.831 | 72592 |
| metamorphic | 0.824 | 30217 |
| stratiform | 0.824 | 79354 |
| precambrian | 0.823 | 28924 |
| breccia | 0.819 | 37637 |
| archaean | 0.817 | 68387 |
| igneous | 0.813 | 20899 |
| dinantian | 0.812 | 48032 |
| facies | 0.812 | 23456 |
| mineralisation | 0.812 | 16006 |
| zechstein | 0.811 | 33130 |
| gneiss | 0.810 | 38681 |
| shale | 0.807 | 13567 |
| proterozoic | 0.806 | 68404 |
| alluvium | 0.804 | 48914 |