| 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 13 m. |
| Geographical Limits: |
Between Aldeburgh and Sizewell, Suffolk. |
| Parent Unit: |
Red Crag Formation (RCG)
|
| Previous Name(s): |
Crag [Obsolete Name and Code: Use SZWL]
(-2472)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
BGS registered borehole TM46SE37 [TM 471 622], Aldeburgh-Sizewell transect, from -34.3 to -47.6 m OD (Zalazeiwicz et al., 1988). |
| Reference(s): |
| McMillan, A A, Hamblin, R J O, and Merritt, J W. 2011. A lithostratigraphical framework for onshore Quaternary and Neogene (Tertiary) superficial deposits of Great Britain and the Isle of Man. British Geological Survey Research Report, RR/10/03. 343pp. |
| 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 |
