"The base of the Lambeth Group is taken at the base of the Upnor Formation. In the Hampshire Basin and the west of the London Basin, the Lambeth Group overlies the Chalk Group. In the centre and east of the London Basin it overlies the Thanet Formation, and in Suffolk the Ormesby Clay Member of the Lista Formation."@en . "Lambeth Group"@en . "48.1"^^ . "59.2"^^ . . . . . "stable"@en . . . . . "The top of the Lambeth Group is marked by the eroded or interburrowed surface at the base of the overlying Thames Group. The uppermost part of the Lambeth Group can be the Reading Formation or the Woolwich Formation, depending on the local succession, or the Upnor Formation, depending on the depth of pre-Thames Group erosion. The Lambeth Group is overlain by sands, silts, clays or gravel beds of the Harwich Formation, depending on the local sequences, or gravelly sandy clays at the base of the London Clay Formation."@en . "London Clay Formation and Lambeth Group (Undifferentiated)"@en . "Lambeth Group"@en . "LMBE"@en . "Woolwich and Reading Series [Obsolete: use WRB, LMBE]"@en . . "Up to 39 m in the west of the London Basin."@en . . "Thanet Formation, Lambeth Group and Harwich Formation (Undifferentiated)"@en . "Clay and sand with subsidiary gravel, mudstone and sandstone and trace lignite and limestone. Stratified bedrock. Occurs onshore. Deposited during the Thanetian Age - to - Ypresian Age (Palaeogene Period) (59.2-48.1 Ma BP)."@en . "Vertically and laterally variable sequences mainly of clay, some silty or sandy, with some sands and gravels, minor limestones and lignites and occasional sandstone and conglomerate. \r\n\r\nThe Lambeth Group was deposited in fluvial, estuarine, lagoonal or proximal marine environments. \r\n\r\nLate Paleocene to Early Eocene (late Thanetian to early Ypresian)."@en . "Woolwich and Reading Beds [Obsolete: use WRB, LMBE, RB]"@en . . .