 |
| |||
| Llanvirnian stage (низы среднего ордовика); Llanvirn (MichaelBurov); Llanvirnian (MichaelBurov); Llanvirn stage (MichaelBurov); Lin (MichaelBurov); Llanvirnian stage (MichaelBurov) | |||
| лланвирнский ярус: 17 phrases in 3 subjects |
| Geochronology | 1 |
| Geology | 4 |
| Stratigraphy | 12 |