. "0.0"^^ . "stable"@en . . "Downholland Silt"@en . "2.58"^^ . "DOS"@en . "Clay and silt. Stratified superficial deposits. Occurs onshore. Formed during the Quaternary Period (2.58-0 Ma BP)."@en . . "Silt and clay, pale blue, commonly shelly. [Generic description: academic papers and BGS Memoirs]."@en . . "Downholland Silt"@en . . .