The BGS Lexicon of Named Rock Units — Result Details

High Lodge Silt Member

Computer Code: HLSI Preferred Map Code: notEntered
Status Code: Full
Age range: Pleistocene Epoch (QP) — Pleistocene Epoch (QP)
Lithological Description: Brown clayey silt above and below grey clayey silt with thin sand laminae developed in the lower brown clay. Locally the deposits have been glacitectonically folded and sheared. Pollen include Pinus and Picea and indicate a boreal forest. Coleopteran assemblage indicates a temperate climate. The archaeological material consists of cores, flakes and flake tools.
Definition of Lower Boundary: In glacitectonic contact with chalky lodgement till (Mildenhall Lower Diamicton of Cook et al. p59-69 in Lewis et al.,1991)
Definition of Upper Boundary: Unconformably overlain by glaciofluvial outwash sand and gravel (Mildenhall Upper Sands and Gravels of Cook et al. p59-69 in Lewis et al.,1991)
Thickness: c.5m (Cook et al. p59-69 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: Shouldham Sand and Gravel Formation (SMSG)
Previous Name(s): High Lodge Clayey Silts And High Lodge Sands (-1595)
High Lodge Member (-1596)
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):
Ashton, N M. 1992. The High Lodge flint industries. In: Ashton, N M, Cook, J, Lewis, S G, and Rose, J. (eds.) High Lodge: Excavations by G de G Sieveking, 1962-68, and J Cook, 1988 London, British Museum Press 120-123 
Ashton, N M. 1999. High Lodge Member. p.19 in A revised correlation of Quaternary deposits in the British Isles. Bowen, D Q (editor). London: The Geological Society. 
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. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable