"stable"@en . . "Beeston Chalk Member"@en . "The lower boundary is placed at the surface above the Catton Sponge Bed."@en . "Chalk with subsidiary flint. Stratified bedrock. Occurs onshore. Deposited during the Campanian Age (Cretaceous Period) (83.7-72.2 Ma BP)."@en . . "BEECK"@en . . "The member comprises soft white chalk with irregular seams of large flints."@en . . . "Beeston Chalk Member"@en . "72.2"^^ . "75 feet [22.8m] estimated by Peake and Hancock."@en . . "the upper boundary is poorly defined at a hardground that is exposed on the coast at West Runton."@en . . "83.7"^^ .