. "Coal."@en . "319.0"^^ . "Clod Coal (Leicestershire, South Derbyshire, Nottingham And Derby)"@en . "Clod Coal (Leicestershire, South Derbyshire, Nottingham And Derby)"@en . . . "Coal. Stratified bedrock. Occurs onshore. Deposited during the Langsettian Substage (Carboniferous Period) (319-318 Ma BP)."@en . "stable"@en . . . . . "318.0"^^ . . "CLOD"@en .