The BGS Lexicon of Named Rock Units — Result Details

Kesgrave Formation (B) [Obsolete Name And Code: See KGCA]

Computer Code: KES Preferred Map Code: Kes
Status Code: Index Level
Age range: Beestonian Stage (QB) — Beestonian Stage (QB)
Lithological Description: Interbedded quartz and quartzite rich sands and sandy gravels in a number of terrace aggradations. NOTE: Type sections given in Whiteman and Rose 1992, Table 3, p. 369.Pebbly sand, gravel and silt - [Generic description: from East Anglian data].
Definition of Lower Boundary: Rests on Cretaceous, Tertiary and Early Quaternary deposits
Definition of Upper Boundary: Marked by rubified 'sol lessive' and Arctic structure soil or by base of Lowestoft Till.
Thickness: Variable, approx. 2 to 10m
Geographical Limits: Thames Basin and East Anglia.
Parent Unit: Dunwich Group (DUNW)
Previous Name(s): Essex White Ballast (-3284)
Kesgrave Sands And Gravels (Obsolete Name And Code: Use Kes) (-4116)
Replaced By Kesgrave Formation (*539)
Kesgrave Formation [Obsolete Code: Use KES] (-1621)
Glacial Sand And Gravel (GSG)
Alternative Name(s): none recorded or not applicable
none recorded or not applicable
Rose, J and Allen, P, 1977. Middle Pleistocene stratigraphy in south-east Suffolk. Quarterly Journal of the Geological Society of London, Vol.133, p.83-102. 
Rose, J, Allen, P and Hey, R W, 1976. Middle Pleistocene stratigraphy in Southern East Anglia. Nature, Vol.236, p.492-494. 
Whiteman, C A and Rose, J. 1992. Thames river sediments of the British Early and Middle Pleistocene. Quarterly Science Reviews, Vol.11, 363-375. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E162 E221 E208 E225 E175 E189 E191 E206 E207 E222 E223 E240