"The base of the Arbroath Sandstone Member, where this overlies the highest conglomerate bed of the Auchmithie Conglomerate."@en . "Auchmithie Conglomerate Member"@en . . "The top of the Red Head Sandstone Member."@en . . . "Conglomerate with subsidiary sandstone. Stratified bedrock. Occurs onshore. Deposited during the Early Devonian Epoch (Devonian Period) (419-394.3 Ma BP)."@en . . "Auchmithie Conglomerate Formation [Obsolete: use ACO]"@en . "Auchmithie Conglomerate Member"@en . "ACO"@en . "Finavon Conglomerate Member"@en . "Up to 245 m thick at Auchmithie."@en . . "Conglomerate with subsidiary sandstone."@en . . . "419.0"^^ . . "stable"@en . . . "394.3"^^ .