The BGS Lexicon of Named Rock Units — Result Details

Auchenwinsey Till Member

Computer Code: AWTI Preferred Map Code: notEntered
Status Code: Full
Age range: Devensian Stage (QD) — Devensian Stage (QD)
Lithological Description: Silty sandy stony clay diamicton ("lodgement till"), very stiff, dark grey, containing clasts of mainly local Westphalian lithogies (sandstone, mudstone, limestone and coal), with dolerite and local mafic igneous rocks. Forming drumlins.
Definition of Lower Boundary: Sharp, convex-up, undulose unconformity with underlying pinkish brown, very stiff, pebbly sandy silty shelly clay diamicton of the Eglinton Shell Till Member, or with dark grey stony diamicton of the Littlestone Till Formation, or bedrock.
Definition of Upper Boundary: Land surface or overlain by various younger Superficial units such as alluvium.
Thickness: To 12m
Geographical Limits: West central Scotland.
Parent Unit: Wilderness Till Formation (WITI)
Previous Name(s): Unit F of Jardine et al., 1988 (-34)
Alternative Name(s): Auchenwinsey Member
Stratotypes:
Type Section  Former Sourlie Opencast Coal Site, excavated into the northwest side of Sourlie Hill, 3.5km northeast of Irvine, Ayrshire. Jardine et al.,1988. 
Reference(s):
Bowen, D Q. 1999. A revised correlation of Quaternary deposits in the British Isles. Geological Society Special Report, No. 23. 
Jardine, W G, Dickson, J H, Haughton, P D W, Harkness, D D, Bowen, D Q and Sykes, G A. 1988. A late Middle Devensian interstadial site at Sourlie, near Irvine, Strathclyde. Scottish Journal of Geology, Vol.24, 288-295. 
Bos, J A A, Dickson, J H, Coope, G R and Jardine, W G. 2004. Flora, fauna and climate change of Scotland during the Weichselian Middle Pleniglacial - palynological, macrofossil and coleopteran investigations. Palaeogeography, Palaeoclimatology and Palaeoecology, Vol.204, 65-100. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable