"stable"@en . . . "CN"@en . "Namurian Stage is the third of six stages of the British regional Carboniferous stratigraphic scheme. It is preceded by the Visean Stage and succeeded by the Westphalian Stage (Geologic Time Scale 2020, fig. 23.5)."@en . . . . . . "319.0"^^ . "Namurian Stage"@en . "Namurian Stage"@en . . . . . "330.3"^^ .