The BGS Lexicon of Named Rock Units — Result Details

Gowrie Silt Member [Obsolete Name And Code: Use GWR]

Computer Code: GOSI Preferred Map Code: notEntered
Status Code: Index Level
Age range: Holocene Epoch (QH) — Holocene Epoch (QH)
Lithological Description: Estuarine clayey silt and clay, may be rooty and structureless or highly laminated with silt and very fine- to medium-grained sand; grey and brownish grey, finely micaceous, with dark sulphidic patches. Brown and grey, fine-grained shelly sand locally indicates a more open marine environment.
Definition of Lower Boundary: Unconformable terraced estuarine deposits, commonly on the Tay-Earn Gravels Member (Forth Clay Formation) and other late Devensian and Holocene units.
Definition of Upper Boundary: Upper boundary most commonly at the surface.
Thickness: Veneer to 10m
Geographical Limits: Lower Tay valley from east of Perth; Tay estuary and Firth of Tay; lower Earn valley (from Bridge of Earn eastwards) and estuary; Eden estuary; Montrose Basin area.
Parent Unit: Carse Clay Formation (CARCL)
Previous Name(s): Post Carse Estuarine Deposits (-2212)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Barry Budden Camp 2 Borehole, BGS Ref.No. 53SW/SE12284/2, from surface to 2.5m depth; Firth of Tay. 
Reference(s):
Armstrong, M, Paterson, I B and Browne, M A E, 1985. Geology of the Perth and Dundee district. Memoir of the British Geological Survey, Sheets 48W, 48E and 49 (Scotland). 108pp. 
Paterson, I B. 1981. The Quaternary geology of the Budden Ness area of Tayside, Scotland. Report of the Institute of Geological Sciences, No.81/1. 
Paterson, I B, Armstrong, M and Browne, M A E. 1981. Quaternary estuarine deposits in the Tay-Earn area, Scotland. Report of the Institute of Geological Sciences, No.81/7. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S048 S048 S049 S057