The BGS Lexicon of Named Rock Units — Result Details

Kinneil Kerse Silt Member

Computer Code: KKSI Preferred Map Code: notEntered
Status Code: Full
Age range: Devensian Stage (QD) — Devensian Stage (QD)
Lithological Description: Marine, grey, soft to firm, clayey silt and dusky yellowish-brown silty clay interlaminated, containing sub-angular ice-rafted clasts (dropstones) of coal, basalt, mudstone and sandstone; characterised by laminations and in some cases, many thin beds of pale coloured silt and sand that are ripple bedded in places. Sporadic mottling and banding in black sulphide. The deposit is considered to be prodeltaic in origin.
Definition of Lower Boundary: The relationship of the Kenneil Kerse Silt Member (Forth Clay Formation) to the underlying Errol Clay Formation is transitional.
Definition of Upper Boundary: Diachronous transitional top with the Abbotsgrange Silt Member is speculative; known only to be overlain unconformably by younger deposits such as the Claret Clay Member (Carse Clay Formation) and Bothkennar Gravel Member (Forth Clay Formation).
Thickness: Veneer to 12m
Geographical Limits: On the southern side of the Forth estuary east of Kincardine Bridge to Bo'ness.
Parent Unit: Forth Clay Formation (FOCL)
Previous Name(s): Kinneil Kerse Beds (-4126)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Kinneil Kerse No.4 Borehole. BGS Ref. NS98SE/121, from 8.6m to 20m depth; Forth estuary. 
Reference(s):
Browne, M A E, Graham, D K and Gregory, D M 1984. Quaternary estuarine deposits in the Grangemouth area, Scotland. Report of the Institute of Geological Sciences, No.16/3. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S031