. . . . "About 120 m in the Hampshire Basin. \r\n\r\nUp to about 140 m in the London Basin."@en . . "In the Hampshire Basin, as for the Wittering Formation, in the east or the Poole Formation in the west. \r\n\r\nIn the London Basin, the base of the Bracklesham Group is at the base of the Bagshot Formation, marked by an upwards change from clay, silt and fine-grained sand of the Claygate Member to thick-bedded, fine-grained sands, with a basal fine gravelly sand developed in places. Locally, erosion has removed the topmost parts of the Claygate Member."@en . "Bracklesham Group [Duplicate: use BRB]"@en . . "stable"@en . . . "In the Hampshire Basin, as for the Selsey Sand Formation. \r\n\r\nIn the London Basin, the Camberley Sand Formation is the youngest Palaeogene unit."@en . "Bracklesham Group"@en . "Bracklesham Sand [Obsolete: use BRB]"@en . . . . "Bournemouth Group [Obsolete: use BRB]"@en . . . . "41.0"^^ . . . . "Clay, sand and silt with subsidiary gravel, ironstone, lignite, sandstone and shells. Stratified bedrock. Occurs onshore. Deposited during the Ypresian Age - to - Lutetian Age (Palaeogene Period) (56-41 Ma BP)."@en . . "Bracklesham Beds [Obsolete: use WIDS, BRB]"@en . "Bracklesham Group"@en . "56.0"^^ . "Bagshot Beds [Obsolete: use BGS, BRB]"@en . "The Bracklesham Group comprises interbedded to interlaminated clays, silts and mostly fine- or medium-grained sands, locally shelly. Glauconite occurs in the mid part of the sequence. Minor coarse-grained sands, fine gravelly sand, gravel beds, sandstones or ironstone concretions occur in places. \r\n\r\nMarginal marine to inner shelf. \r\n\r\nEocene (late Ypresian to late Lutetian)."@en . "Bracklesham Sand/Beds [Obsolete: use BRB]"@en . . . . "BRB"@en . . . . . .