. . "GLEL"@en . "stable"@en . "Limestone. Stratified bedrock. Occurs onshore. Deposited during the Arnsbergian Substage (Carboniferous Period) (327-323.75 Ma BP)."@en . . "Glenboig Limestone"@en . "323.75"^^ . "327.0"^^ . . . . "Glenboig Limestone"@en . . . "Limestone."@en .