Unique values of SIMPCLASS
| Value | Number of Occurrences |
|---|---|
| Proterozoic-Paleozoic | 37622 |
| Mesozoic-Cenozoic | 34737 |
| Quaternary-Neogene | 8375 |
| Other | 7590 |
| Paleozoic-Mesozoic | 4473 |
| Cenozoic | 3842 |
| Archean | 2441 |
| Value | Number of Occurrences |
|---|---|
| Proterozoic-Paleozoic | 37622 |
| Mesozoic-Cenozoic | 34737 |
| Quaternary-Neogene | 8375 |
| Other | 7590 |
| Paleozoic-Mesozoic | 4473 |
| Cenozoic | 3842 |
| Archean | 2441 |