"Averages c.1800 m."@en . "Drawn at the conformable upward passage of massive sandstones of the Bayston - Oakswood Formation to more flaggy siltstones and laminated sandstones of the Bridges Formation."@en . . . . . . "stable"@en . . "635.0"^^ . "At the base of the Bayston - Oakswood Formation massive coarse purplish sandstone with small scattered pebbles rests unconformably upon purple and green shales and sandstones of the Portway Formation. The basal sanstone may reprent the dying out of the Haughmond Conglomerate, which forms the basal member of the Formation, overlying beds that might be equivalent to the Synalds Formation, in the Shrewsbury area."@en . "Coarse silicate-sandstone and sandstone with subsidiary mudstone and siltstone. Stratified bedrock. Occurs onshore. Deposited during the Ediacaran Period (Precambrian) (635-541 Ma BP)."@en . . . "Bayston-Oakswood Formation"@en . . "Bayston-Oakswood Group [Obsolete: use BAGP]"@en . "BAGP"@en . "541.0"^^ . . . . "Coarse-grained purple sandstones and grits with subordinate purple mudstones, siltstones and at least three beds of conglomerate."@en . . . . "Bayston-Oakswood Formation"@en . "Bayston-Oakwood Formation [Obsolete: use BAGP]"@en .