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System: Silurian (443.8 - 419.2 Ma) (chronostratigraphic unit)
Classification by:

stratigraphic intervals
   (System) †Silurian (443.8 - 419.2 Ma)
     1 (Series) †Upper
     2 (Series) †Middle
     3 (Series) †Lower

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Last updated: 15 Jul 2019