"Calcareous mudstone and limestone. Stratified bedrock. Occurs onshore. Deposited during the Courceyan Substage (Carboniferous Period) (359.3-346.7 Ma BP)."@en . . "JNL"@en . "346.7"^^ . . . "Calcareous mudstone and limestone."@en . . . "stable"@en . . "359.3"^^ . "Junction Limestone"@en . . "Junction Limestone"@en . .