Rhuddanian

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In the geologic timescale, the Rhuddanian is the age of the Llandovery epoch of the Silurian period of the Paleozoic era of the Phanerozoic eon that is comprehended between 443.7 ± 1.5 Ma and 439.0 ± 1.8 Ma (million years ago), approximately. The Rhuddanian agesucceeds the Ordovician Period and precedes the Aeronian age.

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Silurian period
Llandovery Wenlock Ludlow Pridoli
Rhuddalian | Aeronian
Telychian		 Sheinwoodian | Homerian Gorstian | Ludfordian
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