The BGS Lexicon of Named Rock Units — Result Details

Thanet Formation

Computer Code: TAB Preferred Map Code: TS
Status Code: Full
Age range: Thanetian Age (GT) — Thanetian Age (GT)
Lithological Description: Glauconite-coated, nodular flint at base, overlain by pale yellow-brown, fine-grained sand that can be clayey and glauconitic. Rare calcareous or siliceous sandstones.
Definition of Lower Boundary: Drawn at base of unworn, glauconite-coated flint of the Bullhead Bed; it rests unconformably on micritic limestone of the Chalk Group.
Definition of Upper Boundary: Drawn at unconformable boundary marked by upward change from fine-grained sands of the Thanet Formation to glauconitic sand of the Woolwich and Reading Beds.
Thickness: 0-30m
Geographical Limits: London Basin, as far north as Ipswich.
Parent Unit: Montrose Group (MONT)
Previous Name(s): Thanet Formation (TAB)
Thanet Sands (-1856)
Thanet Beds (-2473)
Thanet Sand [Obsolete Name And Code: Use TAB] (TS)
Thanet Sands Formation (-3708)
Alternative Name(s): none recorded or not applicable
Type Area  Herne Bay, north Kent: coast section. 
Reference Section  Coast cliffs, Pegwell Bay, Hoverport. 
Whitaker, W. 1866. On the "Lower London Tertiaries" of Kent. Quarterly Journal of the Geological Society London, Vol.22, 404-435. 
Wooldridge, S W, 1926. The structural evolution of the London Basin. Proceedings of the Geologists' Association, Vol.37, p.162-196. 
Curry, D, Adams, C G Boulter, M C, Dilley, F C, Eames, F E, Funnell, B M and Wells, M K. 1978. A Correlation of Tertiary rocks in the British Isles. Geological Society of London Special Publication , Vol.12, 1-72. 
Strong, G E, 1984. Petrography of Thanet Beds samples from the Ramsgate area, Kent. Institute of Geological Sciences, Petrology Unit, Report 260. 
Jolley, D W, 1992. Palynofloral association sequence stratigraphy of the Palaeocene Thanet Beds and equivalent sediments in eastern England. Review of Palaeobotany and Palynology, Vol.74, p.207-237. 
Ward, D J, 1977. The Thanet Beds exposure at Pegwell Bay, Kent. Tertiary Research, Vol.1, p.69-76. 
Ward, D J, 1978. The Lower London Tertiary (Palaeocene) succession of Herne Bay, Kent. Institute of Geological Sciences, Report 78/10. 
Prestwich, J, 1852. On the structure of the strata between the London Clay and the Chalk, etc, part 111. The Thanet Sands. Quarterly Journal of the Geological Society, Vol.8, p.235-268. 
Prestwich, J, 1888. Further observations on the correlation of Eocene strata in England, Belgium and the north of France. Quarterly Journal of the Geological Society, Vol.44, p.88-111. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E270 E256 E269 E162 E285 E206 E207 E222 E240 E241 E257 E258 E259 E271 E272 E273 E274