. . "443.1"^^ . "468.0"^^ . "Bedrock. Occurs onshore. Formed during the Llanvirn Series - to - Ashgill Series (Ordovician Period) (468-443.1 Ma BP)."@en . "Ardmillan Group, Albany Group And Barr Group (Undifferentiated)"@en . . "stable"@en . . "AAB"@en . "Ardmillan Group, Albany Group And Barr Group (Undifferentiated)"@en . .