"stable"@en . . "Nuculoceras nuculum Marine Band (3 of 3)"@en . . . "323.75"^^ . "Mudstone. Stratified bedrock. Occurs onshore. Deposited during the Arnsbergian Substage (Carboniferous Period) (327-323.75 Ma BP)."@en . . . . "Nuculoceras nuculum Marine Band (3 of 3)"@en . . "327.0"^^ . "Mudstone."@en . . . "E2C4"@en .