. . "Garden Course (Vein) [Obsolete: use GNCC]"@en . "Garden Course Coal (Somerset)"@en . "GNCC"@en . . . "Coal."@en . . "Coal. Stratified bedrock. Occurs onshore. Deposited during the Bolsovian Substage (Carboniferous Period) (314.75-310 Ma BP)."@en . . . "310.0"^^ . . . "Garden Course Coal (Somerset)"@en . "stable"@en . "314.75"^^ .