The BGS Lexicon of Named Rock Units — Result Details

Kilmaronock Silt Member

Computer Code: KILK Preferred Map Code: notEntered
Status Code: Full
Age range: Holocene Epoch (QH) — Holocene Epoch (QH)
Lithological Description: The Mains of Kilmaronock Borehole (Browne and McMillan, 1989, Figure 6) contains the standard (and only) section in the Kilmaronock Silt Member (13.6-19.95m in depth). The typical lithology is a very thinly bedded lacustrine silt with many clayey silt and silty clay layers. Sand layers are also common. The deposits are brown, dark brown, browish grey and grey, with plant remains and locally with dark organic-rich bands. Grains and flecks of vivianite are present throughout. The deposit is of a firm and locally stiff consistency and medium to low plasticity.
Definition of Lower Boundary: The Kilmaronock Silt Member of the Strathendrick Formation rests by transitional passage on the underlying Buchanan Clay Member (Clydebank Clay Formation) or with angular unconformity on other, older, Quaternary sediments or bedrock.
Definition of Upper Boundary: The Kilmaronoch Silt Member is only known to be overlain conformably by the Endrick Sand Member forming the lower part of an upwards coarsening unit.
Thickness: Veneer to over 6 metres.
Geographical Limits: The Kilmaronock Silt Member of the Strathendrick Formation is only known to occur in its type area in the Loch Lomond basin including the lower part of the Endrick valley.
Parent Unit: Strathendrick Formation (SRCK)
Previous Name(s): Kilmaronock Formation (-2265)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  British Geological Survey Mains of Kilmaronock Borehole (Registered No. NS 48NW/3). Browne and McMillan, 1989b. 
Type Area  Lower Endrick valley and Loch Lomond basin. 
Reference(s):
Browne, M A E and McMillan, A A. 1989a. Quaternary geology of the Clyde valley. British Geological Survey Research Report, SA/89/1. 
Browne, M A E and McMillan, A A. 1989b. Geology for land use planning: drift deposits of the Clyde valley Volume 1: Planning Report. British Geological Survey Technical Report, WA/89/78. 
Hall, I H S, Browne, M A E and Forsyth, I H. 1998. Geology of the Glasgow district. Memoir of the British Geological Survey, Sheet 30E (Scotland). 
Forsyth, I H, Hall, I H S and McMillan, A A. 1996. Geology of the Aidrie district. Memoir of the British Geological Survey, Sheet 31W (Scotland). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S038