"Brora Brick Clay Member"@en . . "Brora Brick Clay Member"@en . . "Clay. Stratified bedrock. Occurs onshore. Deposited during the Callovian Age (Jurassic Period) (165.3-161.5 Ma BP)."@en . "165.3"^^ . . . . . "stable"@en . "BROBC"@en . . . "161.5"^^ . "Clay."@en .