. . "318.0"^^ . "DFC"@en . . . "319.0"^^ . . . "Dunaskin Fireclay"@en . "Seat-earth mudstone."@en . "Dunaskin Fireclay"@en . . "Seat-earth mudstone. Bedrock. Occurs onshore. Formed during the Langsettian Substage (Carboniferous Period) (319-318 Ma BP)."@en . "stable"@en . .