| Computer Code: |
CNYSG |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Pleistocene Epoch (QP)
— Pleistocene Epoch (QP) |
| Lithological Description: |
Flint-rich sand and gravel containing numerous clasts of vein quartz and quartzite with far-travelled erratics of dolerite, schist, greywacke, Old Red Sandstone, granodiorite and porphyry. They possess a wide range of sedimentary structures including horizontal and planar cross-bedding and ripple drift cross-lamination and were deposited as proximal glaciofluvial deposits. |
| Definition of Lower Boundary: |
none recorded or not applicable
|
| Definition of Upper Boundary: |
Truncated by Lowestoft Till Member. |
| Thickness: |
Typically between 2 and 6 metres. |
| Geographical Limits: |
Restricted to the area between Knettishall and Diss. |
| Parent Unit: |
Happisburgh Glacigenic Formation (HPGL)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Dis-used sand and gravel pit and Knettishall, Suffolk. |
| Reference(s): |
| Lewis, S G, Rose, J, Davies, H. 1998. Pre-Anglian fluvial and glaciogenic sediments, Knettishall, Suffolk, England. Proceedings of the Geologists' Association, 110, 17-32. |
| 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: |
|
E174
|
