The BGS Lexicon of Named Rock Units — Result Details

Terrington Beds

Computer Code: TTB Preferred Map Code: notEntered
Status Code: Index Level
Age range: Holocene Epoch (QH) — Holocene Epoch (QH)
Lithological Description: The Terrington Beds result from a transgression that caused marine and brackish water silt and fine-grained sand to be deposited far inland in the major river courses and gave rise to extensive salt-marsh deposits of interlaminated dull, reddish brown clays and pale brown silts which were sufficiently well drained by the time of the Roman occupancy for them to have been extensively colonised.
Definition of Lower Boundary: The Terrington Beds disconformably overlie the Nordelph Peat or the Barroway Drove Beds. Both the Terrington Beds and the Barroway Drove beds comprise former saltmarsh deposits and thus have very similar lithologies. However the Nordelph Peat is commonly interbedded and this aids differentiation between the units.
Definition of Upper Boundary: The Terrington Beds are at surface or locally overlain by Storm Beach gravels.
Thickness: Generally up to about 3m but locally may be somewhat thicker.
Geographical Limits: Restricted to the area of The Wash in East Anglia.
Parent Unit: Fenland Formation (FEND)
Previous Name(s): Warp (WARP)
Upper Silt (-2501)
Alternative Name(s): Younger Salt Marsh Deposits
Stratotypes:
Type Area  Area around the village of Terrington St Clement, Norfolk. Gallois, 1978 
Reference(s):
Gallois, R W. 1988. Geology of the country around Ely. Memoir of the British Geological Survey, Sheet 173 (England and Wales). 
Horton, A. 1989. Geology of the Peterborough district. Memoir of the British Geological Survey, Sheet 158 (England & Wales). 
Gallois, R W. 1979. Geological investigations for the Wash Water Storage Scheme. Report of the Institute of Geological Sciences, 78/19, 1-74pp. 
Gallois, R W, 1994. The geology of the country around King's Lynn and The Wash. Memoir of the British Geological Survey, Sheet 145 and part of 129 (England and Wales). 
Whitaker, W and Jukes-Browne, A J. 1899. The geology of the borders around The Wash: including Boston and Hunstanton. Memoir of the Geological Survey of England and Wales. 
Godwin, H.1940. Studies of the post-glacial history of British vegetation. Parts III and IV. Philosophical Transactions of the Royal Society, London, B230, 239-303. 
Skertchly, S B J. 1877. The geology of Fenland. Memoir of the Gological Survey of Great Britain. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E129 E128 E144 E145 E158 E159 E172 E173