The BGS Lexicon of Named Rock Units — Result Details

Sizewell Member

Computer Code: SZWL Preferred Map Code: notEntered
Status Code: Full
Age range: Quaternary Period (Q) — Quaternary Period (Q)
Lithological Description: Shelly sands with clay lenses.
Definition of Lower Boundary: Unconformable on the Coralline Crag Formation or on bedrock of Palaeogene and Cretaceous age.
Definition of Upper Boundary: Overlain by Thorpeness Member (Red Crag Formation).
Thickness: Up to 13m.
Geographical Limits: Between Aldeburgh and Sizewell, Suffolk.
Parent Unit: Red Crag Formation (RCG)
Previous Name(s): Crag (-2472)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  By track south-east of Home Farm, Sizewell, Suffolk. Section of borehole BGS Registered No. TM46SE/37 between -34.3 and -47.6m OD. Zalazeiwicz et al,1988 
Reference(s):
Zalasiewicz, J A, Mathers, S J, Hughes, M J, Gibbard, P L, Peglar, S M, Harland, R, Nicholson, R A, Boulton, G S, Cambridge, P and Wealthall, G P. 1988. Stratigraphy and palaeoenvironments of the Red Crag and Norwich Crag formations between Aldeburgh and Sizewell, Suffolk, England. Philosophical Transactions of the Royal Society of London, Vol.B322, 221-272. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable