"BNI"@en . "314.75"^^ . . "310.0"^^ . "Burnwood Ironstone"@en . "Burnwood Ironstone"@en . . . . "stable"@en . . . "Bedrock. Occurs onshore. Formed during the Bolsovian Substage (Carboniferous Period) (314.75-310 Ma BP)."@en .