. "KCAM"@en . "Kimmeridge Clay Formation and Ampthill Clay Formation (Undifferentiated) [Duplicate: use AMKC]"@en . . . "stable"@en . . "149.2"^^ . "Ampthill Clay Formation and Kimmeridge Clay Formation (Undifferentiated)"@en . . . . "Siliciclastic argillaceous rock. Bedrock. Occurs onshore. Formed during the Kimmeridgian Age (Jurassic Period) (154.8-149.2 Ma BP)."@en . "[Duplicate: use AMKC]"@en . "154.8"^^ . . "Kimmeridge Clay Formation and Ampthill Clay Formation (Undifferentiated) [Duplicate: use AMKC]"@en .