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| English | Russian |
| geological period | период (("период" в геологии) A geologic system, or simply system, is a chronostratigraphic unit of geologic time more commonly referred to as a "period" or "geologic period" MichaelBurov) |
| postJurassic period | послеюрский период (MichaelBurov) |
| Triassic period | триасовый период (MichaelBurov) |