The BGS Lexicon of Named Rock Units — Result Details

Runton Till Member

Computer Code: RUTI Preferred Map Code: notEntered
Status Code: Full
Age range: Pleistocene Epoch (QP) — Pleistocene Epoch (QP)
Lithological Description: The Runton Till Member consists of a dark grey to greyish brown matrix-supported diamicton that contains highly attenuated lenses and laminations of sand, chalk and reworked inclusions of older and more chalky till (Walcott Till Member).
Definition of Lower Boundary: The Runton Till Member rests unconformably upon preglacial marine deposits of the Wroxham Crag Formation. The boundary is sharp and planar and in places resembles a surface of decollement. The boundary is represented by a lithological change from sands and gravels to diamicton.
Definition of Upper Boundary: The Runton Till Member exhibits a gradational upper boundary with the Bacton Green Till, with a transition from massive, highly consolidated diamicton, to stratified diamicton.
Thickness: Up to 9m at stratotype locality.
Geographical Limits: The Runton Till Member crops out between East Runton and Sheringham on the north Norfolk coast.
Parent Unit: Sheringham Cliffs Formation (SMCL)
Previous Name(s): Laminated Diamicton (-1155)
Third Cromer Till (-2606)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Coastal sections between West Runton (east) and Sheringham (west) in the vicinity of Beeston Hill, north Norfolk. Hart and Boulton, 1991. 
Reference(s):
Banham, P H. 1968. A preliminary note on the Pleistocene stratigraphy of northeast Norfolk. Proceedings of the Geologists' Association, Vol.79, 507-512. 
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. 
Lee, J R. 2003. Early and Middle Pleistocene lithostratigraphy and palaeoenvironments in northern East Anglia, UK. Unpublished PhD Thesis, Royal Holloway University of London. 
Hart, J K and Boulton, G S. 1991. The interelation of glaciotctonic and glaciodepositional processes within the glacial environment. Quaternary Science Reviews, Vol.10, 335-350. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable