. "stable"@en . "Sandstone."@en . "Sandstone. Bedrock. Occurs onshore. Formed during the Aeronian Age (Silurian Period) (440.5-438.6 Ma BP)."@en . "440.5"^^ . . "30m"@en . "438.6"^^ . . . . "FOST"@en . "Folly Sandstone"@en . "Folly Sandstone"@en . .