"Ground surface."@en . . . . . "Grange-Over-Sands Formation"@en . "0.0"^^ . "At least 12m"@en . "Clay and sand with subsidiary peat and silt and trace gravel. Stratified superficial deposits. Occurs both onshore and offshore. Formed during the Holocene Epoch (Quaternary Period) (.0118-0 Ma BP)."@en . "stable"@en . . "0.0118"^^ . . . "Grange-Over-Sands Formation"@en . "Grange Formation [Obsolete: use GROS]"@en . "Probably silt, clay and sand, with gravel and peat."@en . "GROS"@en . . "Probably overlies bedrock or sediments of the Irish Sea Coastal Glacigenic Subgroup."@en . .