. . "ALV1"@en . "See Alluvium (ALV). Alluvium, 1 is older than Alluvium in the same area."@en . . "Alluvium, 1"@en . . "2.58"^^ . . . "0.0"^^ . "Clay, silt and silty clay with subsidiary gravel and sand and trace peat. Superficial deposits. Occurs onshore. Formed during the Quaternary Period (2.58-0 Ma BP)."@en . "stable"@en . . . . "Alluvium, 1"@en . "Older alluvium [Obsolete: use ALV1]"@en .