"346.7"^^ . "Alternating bands of sandstone andsandy, shalety mudstone, locally massive and current-bedded."@en . "HGS"@en . . "359.3"^^ . . "High Grains Sandstone"@en . "stable"@en . "c.6 to c.12m"@en . . . "High Grains Sandstone"@en . . . . "Sandstone. Stratified bedrock. Occurs onshore. Deposited during the Courceyan Substage (Carboniferous Period) (359.3-346.7 Ma BP)."@en . .