"Cromer Till [Obsolete: use BRLA, HPGL, LOFT, SMCL]"@en . . "0.0118"^^ . . "North Sea Drift Formation [Obsolete: use HPGL, OVSD, SMCL]"@en . . . . "Consists of a range of diamictons, sands and gravels, sands and laminated silts and clays. The diamictons (Happisburgh Till, Corton Till and California Till members) are typically sandy matrix-supported diamictons that contain a high abundance of flint and quartzose lithologies relative to chalk, distinguishing them from the more chalky tills of the overlying Lowestoft Formation."@en . "Corton Formation [Obsolete: use HPGL]"@en . . "Happisburgh Glacigenic Formation"@en . . "2.58"^^ . . "Diamicton, sand and sandy gravel with subsidiary laminated clay and silt. Stratified superficial deposits. Occurs onshore. Formed during the Pleistocene Epoch (Quaternary Period) (2.58-.0118 Ma BP)."@en . . . . . . . "To about 20m"@en . "HPGL"@en . . "The lower boundary of the Happisburgh Formation is commonly erosional in northeast Norfolk and the Waveney Valley and truncates shallow marine deposits of the Wroxham Crag Formation. More rarely, such as at sites like Leet Hill in southern Norfolk, coarse-grained outwash deposits (the Leet Hill Sand and Gravel Member) exhibit a gradational lower contact with river terrace deposits of the Bytham Catchment Subgroup."@en . . . "stable"@en . "Happisburgh Glacigenic Formation"@en . "The upper boundary of the Happisburgh Formation is erosional and angular, and truncated by the more chalky tills of the Lowestoft Formation."@en . .