"Comprises a basal sequence of grey siltstones and dolomites overlain by evaporites (St Bees Evaporite Formation), overlain by red siltstones, silty mudstones and calcareous sandstones (St Bees Shale Formation), which locally pass laterally into halite."@en . "Cumbrian Coast Group"@en . "Calcareous sandstone, dolostone, halite, non-carbonate salt-rock, siltstone and silty mudstone with subsidiary mudstone and sandstone. Stratified bedrock. Occurs both onshore and offshore. Deposited during the Permian Period (298.9-251.9 Ma BP)."@en . . . "CCO"@en . . . . . . "Tends to be gradational therefore taken arbitrarily where sandstone (St Bees Sandstone Formation) becomes predominent over siltstone (St Bees Shale Formation)."@en . . . "Point in sequence where there is a sharp upwards change from either Brockram or red sandstone, to grey siltstones or dolomites."@en . "Ranges from 36m in type section to 300m+ in Irish Sea grabens."@en . "stable"@en . "251.9"^^ . "298.9"^^ . . "Cumbrian Coast Group"@en . . .