The Ocean | Pelagial | 9.0
The Ocean | Anthropocentric | 8.0
The Ocean | Phanerozoic I: Palaeozoic | 
The Ocean | Heliocentric | 8.0
The Ocean | Holocene | 7.73
The Ocean | Phanerozoic II: Mesozoic | Cenozoic | 
The Ocean | Precambrian | 
The Ocean | Fluxion | 
The Ocean | Aeolian | 
The Ocean |  | 
The Ocean | Oligocene |