"143.1"^^ . . . . "Cromer Knoll Group"@en . . . . "Sandstones, mudstones, siltstones and limestones of the Valhall Formation, Rødby Formation, Carrack Formation, Britannia Sandstone Formation and Wick Formation. Originally erected by Rhys (1974), emended by Deegan and Scull (1977) and further revised by Johnson and Lott (1993)."@en . "Mudstone, sandstone and siltstone with subsidiary limestone. Stratified bedrock. Occurs both onshore and offshore. Deposited during the Berriasian Age - to - Albian Age (Cretaceous Period) (143.1-100.5 Ma BP)."@en . . . "A downward change from the Valhall and Wick Sandstone formations in the lower part of Cromer Knoll Group to the mainly argillaceous Kimmeridge Clay Formation of the Humber Group."@en . . . "Cromer Knoll Group"@en . "Downward change from the chalks of the Chalk Group and the calcareous and chalky mudstones, of the Svarte Formation of the Shetland Group, to the Rødby Formation at the top of the Cromer Knoll Group."@en . . . "stable"@en . . . "CRKN"@en . . "100.5"^^ . . .