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Stratigraphic time

<< Stratigraphic table

Ordovician

Millions years ago: 485.4 - 443.8
This age is part of 
Phanerozoic541 - recent
Paleozoic541 - 251.9
This age is subdivided to 
Upper Ordovician458.4 - 443.8
Middle Ordovician470 - 458.4
Lower Ordovician485.4 - 470
 Number of records
Taxa1517