| Computer Code: |
CREET |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Quaternary Period (Q)
— Quaternary Period (Q) |
| Lithological Description: |
Well-sorted fine- to medium-grained micaceus sand, generally up to about 11 m thick but locally up to more than 80 m in the Stradbroke Trough. Its sedimentology indicates that it formed in an intertidal environment. |
| Definition of Lower Boundary: |
Overlies the Crag 'Stone-bed' comprised predominantly of flints and phosphate nodules, or is unconformable on Chalk. There is a sharp lithological change across junction. |
| Definition of Upper Boundary: |
Overlain locally by College Farm Member, Kesgrave Formation or Lowestoft Formation. Junction is easily determined by change in lithology. |
| Thickness: |
Generally up to about 11 m but up to over 80 m in the Stradbroke Trough. |
| Geographical Limits: |
The member appears to be confined to the southern end of the Stradbroke Trough at Creeting St Mary, in a shallow marine embayment at Great Blakenham and in the main Crag Basin at such sites as Valley Farm [TM 116 433] and Kesgrave [TM 228 465]. |
| Parent Unit: |
Norwich Crag Formation (NCG)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Allen (1984). |
| Reference(s): |
| Allen, P. 1984. Field guide to the Gipping and Waveney valleys, Suffolk, May, 1982. Cambridge, Quaternary Research Association. |
| Gibbard, P L. 1988. The history of the great northwest European rivers during the past three million years. Philosophical Transactions of the Royal Society of London, Vol. B318, 559-602. |
| 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. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
