| Computer Code: |
AHSG |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Wolstonian Stage (QO)
— Devensian Stage (QD) |
| Lithological Description: |
Sand and gravel, horizontal and cross stratified, interpreted to represent longtitudinal bars of proximal to medial reaches of a glaciofluvial outwash fan. |
| Definition of Lower Boundary: |
Sharp, irregular, erosional contact with underlying clay-rich gravel or clayey sand of the Lawthorn Diamicton Member, with relief amplitude of about 3.5m. |
| Definition of Upper Boundary: |
Sharp, conformable contact with laminated sand and organic-rich clay and silt of the Sourlie Organic Silt Formation. |
| Thickness: |
To 5.5m |
| Geographical Limits: |
Probably local to west Ayrshire. |
| Parent Unit: |
Midland Valley Glacigenic Subgroup (MVG)
|
| Previous Name(s): |
Unit C of Jardine et al., 1988
(-635)
|
| Alternative Name(s): |
Armsheugh 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 |
