The BGS Lexicon of Named Rock Units — Result Details

Starston Till Member

Computer Code: STIL Preferred Map Code: notEntered
Status Code: Full
Age range: Pleistocene Epoch (QP) — Pleistocene Epoch (QP)
Lithological Description: Brown clayey-sand matrix-supported diamicton with flint and sporadic chalk pebbles. Laminations are common.
Definition of Lower Boundary: The basal boundary of the Starston Till Member is abrupt and commonly erosional. The Member overlyies Bytham River (Bytham Catchment Subgroup) deposits at the stratotype locality, where a lithological change from sand and gravel to till can be observed.
Definition of Upper Boundary: The upper boundary of the Starston Till Member with overlying glaciofluvial outwash (un-named) is erosional. Hollows on the upper surface of the till are commonly infilled by a coarse gravel lag.
Thickness: To 7m
Geographical Limits: Buried beneath Lowestoft Formation till at depth within the Diss and Harleston districts, southern Norfolk.
Parent Unit: Happisburgh Glacigenic Formation (HPGL)
Previous Name(s): Lower Glacial (-3697)
Starston Member (-1205)
Starston Till (-1846)
Lower Boulder Clay (-2079)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Section in a quarry to the north of Harleston, southern Norfolk. Lawson, 1982. 
Type Area  Around Starston in the Waveney Valley. See the Diss Memoir. 
Reference(s):
Mathers, S J, Horton, A and Bristow, C R. 1993. Geology of the country around Diss, Memoir of the British Geological Survey, l Sheet 175 (England & Wales). 
Auton, C A, Morigi, A M and Price, D. 1985. The sand and gravel resources of the country around Harleston and Bungay, Norfolk and Suffolk. Description of 1:25000 resource sheets comprising parts of TM 27, 28, 38 and 39. Mineral Assessment Report, British Geological Survey, 145. 
Bowen, D Q. 1999. A revised correlation of Quaternary deposits in the British Isles. Geological Society Special Report, No. 23. 
Lawson, T E. 1982. Geological notes and local details for 1:10 000 sheets TM 28 NW, NE, SW and SE (Harleston, Norfolk). Institute of Geological Sciences. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E175