. . "Sandstone. Stratified bedrock. Occurs onshore. Deposited during the Aeronian Age (Silurian Period) (440.5-438.6 Ma BP)."@en . "Sandstone."@en . . "438.6"^^ . . . "stable"@en . "Gasworks Sandstone Formation"@en . "440.5"^^ . . . "Gasworks Sandstone Formation"@en . "c.85m"@en . "GWST"@en .