. . "Clonmass Formation"@en . . "541.0"^^ . "1000.0"^^ . . "Sessiagh Clonmass Formation [Obsolete: use DASC]"@en . . "Stratified bedrock. Occurs onshore. Deposited during the Neoproterozoic Era (Precambrian) (1000-541 Ma BP)."@en . . . "Clonmass Formation"@en . "stable"@en . "DASC"@en . .