The BGS Lexicon of Named Rock Units — Result Details

Southern Uplands Glacigenic Subgroup

Computer Code: SUDR Preferred Map Code: SUD
Status Code: Full
Age range: Devensian Stage (QD) — Devensian Stage (QD)
Lithological Description: Diamicton, gravel, sand, silt and clay containing clasts predominantly of greywacke sandstone and siltstone with some granite, granodiorite, porphyry and dolerite. Deposits locally dominated by granite or granodiorite. Typically yellowish brown but locally reddish brown.
Definition of Lower Boundary: Unconformable on bedrock.
Definition of Upper Boundary: Ground surface or conformable contact with Flandrian sediments.
Thickness: 30m
Geographical Limits: Southern Uplands of Scotland.
Parent Unit: Caledonia Glacigenic Group (CALI)
Previous Name(s): Southern Uplands Drift Group (-3060)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  The Southern Uplands Glacigenic Subgroup comprises deposits with a significant proportion of Early Palaeozoic wacke sandstone, siltstone and mudstone components. The type area is the Southern Uplands. The principal centres of ice build-up were the Galloway Hills and the Moffat Hills. New lithostratigraphical formations have been establised in the Dumfries-Carlisle area and reference is made to stratotypes of this district including the Langholm Till Formation, Dalswinton Moraine Formation, Kirkbean Sand and Gravel Formation and the Mouldy Hills Gravel Formation. The Southern Uplands of Scotland from SW (NW9000 5000) to NE (NT9000 6000) including most of NX and NT 100 km tiles. 
Reference(s):
McMillan, A A, Merritt, J W, Auton, C A and Golledge, N R [In preparation]. The Quaternary geology of the Solway area. BGS Research Report. 
McMillan, A A, Hamblin, R J O and Merritt, J W. 2005. An overview of the lithostratigraphical framework for the Quarternary and Neogene deposits of Great Britain (onshore). British Geological Survey Research Report RR/04/04. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable