| Computer Code: |
RUCSG |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Pleistocene Epoch (QP)
— Pleistocene Epoch (QP) |
| Lithological Description: |
The Runton Cliffs Sand and Gravel Member is composed of planar cross-bedded, rippled, channelised and horizontally-bedded yellow to olive brown sands with sporadic beds of massive or cross-bedded gravel. The flint gravel content (c.82%) is low compared to other outwash lithofacies in north Norfolk, but it contains a high content (c.3-4%) of far travelled erratics including Carboniferous limestone, micaceous schist, quartz-schist, granodiorite, felsic porphyry and andesite. |
| Definition of Lower Boundary: |
The Runton Cliffs Sand and Gravel Member rests upon the upper surface of the Bacton Green Till Member. The contact is abrupt and scoured and marked by a lithological change from till to sand and gravel. An additional geometric complexity is that the deposit has been loaded (gravitationally) into the Bacton Green Till Member. |
| Definition of Upper Boundary: |
The upper boundary of the deposit is truncated by the ground surface. |
| Thickness: |
To 10m |
| Geographical Limits: |
Coastal sections between East Runton and Sheringham. |
| Parent Unit: |
Sheringham Cliffs Formation (SMCL)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Coastal sections within Beeston Cliffs, north of West Runton, north Norfolk. Within these cliff sections, large sag basins containing the Runton Sand and Gravel Member can be seen with the Runton Till and Bacton Green Till members. |
| Reference(s): |
| Lee, J R, Booth, S J, Hamblin, R J O, Jarrow, A M, Kessler, H, Moorlock, B S P, Morigi, A N, Palmer, A, Riding, J B and Rose, J. 2004. A new stratigraphy for the glacial deposits around Lowestoft, Great Yarmouth, North Walsingham and Cromer, East Anglia, UK. Bulletin of the Geological Society of Norfolk, Vol.53, 3-60. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
