"Llandeilian Stage"@en . . . "Llandeilian Stage is a stage in the British regional Ordovician stratigraphic scheme. It is the second of two stages of the Llanvirn Series. It is preceded by the Abereiddian Stage and succeeded by the Aurelucian Stage (Caradoc Series) (Geologic Time Scale 2020, fig. 20.12)."@en . "458.2"^^ . "Llandeilian Stage"@en . "stable"@en . "O3"@en . . . "461.25"^^ .