| Computer Code: |
LSTI |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Wolstonian Stage (QO)
— Devensian Stage (QD) |
| Lithological Description: |
Silty, sandy, stony clay diamicton ("lodgement till"), very stiff, dark grey, containing clasts of mainly local Westphalian lithologies (sandstone, mudstone, limestone, coal), and dolerite. Locally enclosing deformed sheets of sand up to 7.5m thick. |
| Definition of Lower Boundary: |
Sharp, irregular contact with bedrock, with relief amplitude of 7.5m, part controlled by faults in the bedrock. |
| Definition of Upper Boundary: |
Sharp, undulose contact with overlying clay-rich gravel or clayey sand of the Lawthorn Diamicton Member. |
| Thickness: |
To 7.5m |
| Geographical Limits: |
Probably widespread in west central Scotland. |
| Parent Unit: |
Midland Valley Glacigenic Subgroup (MVG)
|
| Previous Name(s): |
Unit A [Obsolete Name and Code: Use LSTI]
(-4771)
|
| Alternative Name(s): |
Littlestone 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): |
| 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. |
| 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. |
| Bowen, D Q. 1999. A revised correlation of Quaternary deposits in the British Isles. Geological Society Special Report, No. 23. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
