"White, grey-blue or pink massive sandstone (freestone) in two major units."@en . . "stable"@en . . "Sandstone. Stratified bedrock. Occurs onshore. Deposited during the Visean Age (Carboniferous Period) (346.7-330.3 Ma BP)."@en . . "346.7"^^ . "330.3"^^ . . . "HSS"@en . . . . "Hailes Sandstone"@en . "c.65m"@en . "Hailes Sandstone"@en .