"Thanet Formation"@en . "59.2"^^ . . "Typically composed of homogeneous, bioturbated, glauconitic silty fine-grained sand, with sandy silt, silt or sandy, silty clay especially in the lower part, forming a coarsening-upwards sequence. The deposits are generally pale yellow-brown in colour, typically with a 'peppering' of dark-coloured glauconite grains. Sparse white mica occurs throughout. Rare coarse gravel is present in places in London. Patchy calcareous, siliceous or ferruginous cement occurs locally. A thin gravel and cobble bed (the 'Bullhead Bed') is generally present at the base. It comprises unworn green-coated flints in a matrix of green, glauconite-rich clayey sand. Dispersed and degraded volcanic ash occurs at least locally in the Thanet Formation (Ellison and Lake, 1986; Knox, 1979). \r\n\r\nThe Thanet Formation was deposited on an inner to outer marine shelf, above fair-weather wave base (Ellison et al., 1994). The heavy mineral content of the sands suggests a Scottish provenance, in contrast to that of the overlying Upnor Formation, but similar to that of most of the younger Palaeogene formations (Morton, 1982). \r\n\r\nLate Paleocene; early to mid-Thanetian (Blake, 1903; Ellison et al., 1994; King, in prep.)."@en . "Thanet Sands Formation [Obsolete: use TAB]"@en . "stable"@en . . . . "In central London, the Thanet Formation is typically 10 to 15 m thick, diminishing westwards to where it is overstepped by the Lambeth Group in west London and Surrey. The formation is generally thicker in the eastern parts of the London Basin, and is greatest in North Kent, where it generally ranges from about 20 m up to 30 m, increasing to as much as 37 m in the Canterbury district (Hester, 1965; Smart et al., 1966). In places significant parts of the Thanet Formation have been removed by erosion prior to deposition of the Lambeth Group (Curry, 1981). At Beacon Hill, west of Faversham, the thickness is about 24 m, whereas at Goodnestone it is little more than 18m (Holmes, 1981)."@en . . "56.0"^^ . . "Thanet Formation"@en . . . "The Thanet Formation is overlain unconformably by the Upnor Formation in most areas but by the Reading Formation in parts of Essex. Generally, an upwards change from yellow-brown, glauconitic silty fine-grained sands of the Thanet Formation to greenish glauconitic medium- to coarse-grained, locally gravelly, variably clayey sand of the Upnor Formation. In the type section and in some other places, the grain-size contrast is less and the boundary correspondingly more difficult to identify."@en . . "The base of the Thanet Formation is the base of the basal sandy, clayey flint gravel bed, which rests on the Chalk Group, often on an irregular, karstic surface modified by dissolution in groundwater."@en . . "Thanet Beds [Obsolete: use TAB]"@en . . "TAB"@en . "Clay, sand and silt with subsidiary flint and sandstone and trace ash. Stratified bedrock. Occurs onshore. Deposited during the Thanetian Age (Palaeogene Period) (59.2-56 Ma BP)."@en . . "Thanet Sand [Obsolete: use TAB]"@en . "Thanet Formation, Lambeth Group and Harwich Formation (Undifferentiated)"@en . . . . . . "Thanet Sands [Obsolete: use TAB]"@en .