The BGS Lexicon of Named Rock Units — Result Details

Trimingham Clay Member

Computer Code: TRIMC Preferred Map Code: notEntered
Status Code: Full
Age range: Pleistocene Epoch (QP) — Pleistocene Epoch (QP)
Lithological Description: The Trimingham Clay Member consists of rhythmically laminated clays and pale grey silts.
Definition of Lower Boundary: The lower boundary of the Trimingham Clay Member is gradational with the Bacton Green Till Member, representing a lithological change from stratified sandy diamicton to laminated silts and clays.
Definition of Upper Boundary: The nature of the upper boundary between the laminated silts and clays (Trimingham Clay Member) and the overlying sandy facies of the Trimingham Sand Member is sharp and irregular.
Thickness: Up to 2.2m have been observed at the stratotype.
Geographical Limits: Coastal cliff sections between Trimingham and Sidestrand, northern Norfolk.
Parent Unit: Sheringham Cliffs Formation (SMCL)
Previous Name(s): Trimingham Sand And Clay Member [Obsolete Name And Code: See TRIMC And TRIMS] (TRIM)
Alternative Name(s): none recorded or not applicable
Type Section  The stratotype for the Trimingham Clay Member is characterized within coastal cliff sections to the northwest of Trimingham in north Norfolk. At this locality the Trimingham Clay Member can be seen overlying the Bacton Green Till Member, and is overlain in-turn by the Trimingham Sand Member. Lunkka, 1994. 
Lunkka, J P. 1994. Sedimentation and lithostratigraphy of the North Sea Drift and Lowestoft Till Formations in the coastal cliffs of northeast Norfolk, England. Journal of Quaternary Science, Vol. 9, 203-233. 
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. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable