Computer Code: |
HLOGR |
Preferred Map Code: |
notEntered |
Status Code: |
Full |
Age range: |
Quaternary Period (Q)
— Quaternary Period (Q) |
Lithological Description: |
Sand and gravel of predominantly flint and chalk with quartz and quartzite and traces of far travelled lithologies including Rhaxella chert. |
Definition of Lower Boundary: |
Unconformable boundary, locally channelised, with High Lodge Silt Member |
Definition of Upper Boundary: |
Unconformably overlain by debris flow deposits (Mildenhall Upper Diamicton of Cook et al. p. 59-69 in Lewis et al. 1991) |
Thickness: |
c.8 m (Cook et al. p.59-69 in Lewis et al.1991) |
Geographical Limits: |
Restricted to palaeovalley of the River Bytham, in the Mildenhall area of Suffolk. Not depicted on BGS maps |
Parent Unit: |
Lowestoft Formation (LOFT)
|
Previous Name(s): |
Mildenhall Upper Sands and Gravels [Obsolete Name and Code: Use HLOGR]
(-4095)
|
Alternative Name(s): |
none recorded or not applicable
|
Stratotypes: |
Type Section |
Temporary excavations about 300m west of High Lodge Farm Ashton et al,1992 |
Reference(s): |
Cook, J, Ashton, N, Cooper, G R, Hunt, C O, Lewis, S G and Rose, J.1991.High Lodge, Mildenhall,Suffolk (TL 739 754). p.59-69 in Central East Anglia and the Fen Basin:Field Guide. Lewis, S G ,Whiteman, C A and Bridgland, D R (editors).London:Quaternary Research Association. |
Ashton, N M. 1992. The High Lodge flint industries. 120-123 in High Lodge: Excavations by G de G Sieveking, 1962-68, and J Cook, 1988. Ashton, N M, Cook, J, Lewis, S G, and Rose, J (editors). (London: British Museum Press.) |
Ashton, N M. 1999. A revised correlation of Quaternary deposits in the British Isles. Bowen, D Q (editor). London: The Geological Society. High Lodge Member. p.19. |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
none recorded or not applicable |