Rhuddanian

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 age succeeds the Ordovician Period and precedes the Aeronian age.

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

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