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бартонский
| ярус
| бартонский | |
| geol. | Bartonian |
| ярус | |
| gen. | circle; layer; horizon; storey; story; assise |
| chem. | compartment |
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| Bartonian (MichaelBurov) | |||
| бартонский: 17 phrases in 3 subjects |
| Geochronology | 2 |
| Geology | 11 |
| Stratigraphy | 4 |