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Stage: Llandoverian (chronostratigraphic unit)
Classification by:

stratigraphic intervals
   (System) †Silurian (443.8 - 419.2 Ma)
     (Series) †Lower
       (Stage) †Llandoverian
         1 (Substage) †Telychian
         2 (Substage) †Aeronian
         3 (Substage) †Rhuddanian

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Last updated: 1 Feb 2024