| |||
геологическая система (MichaelBurov) | |||
периодичность геологических процессов и явлений | |||
геологический период | |||
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) | |||
| |||
геологический период |
geological period: 2 phrases in 1 subject |
Oilfields | 2 |