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ордовикская
| эпоха
| Ордовикская | |
| oil | Ordovician |
| ордовикский | |
| geochron. | Ord; Ordovician |
| эпоха | |
| gen. | epoch; era; period; age; days; reference |
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| Ord (MichaelBurov); Ordovician (MichaelBurov) | |||
| Ord (MichaelBurov); Ordovician (страт. MichaelBurov) | |||
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| Ordovician (система) | |||
| ордовикская: 40 phrases in 7 subjects |
| Drilling | 1 |
| Geochronology | 14 |
| Geology | 13 |
| Makarov | 2 |
| Oil and gas | 1 |
| Paleontology | 1 |
| Stratigraphy | 8 |