Southern Highland Group

Southern Highland Group
Stratigraphic range: Neoproterozoic
Folded schist of the Beinn Bheula Schist Formation, which is part of the Southern Highland Group, at Ben Vane
Type	Group
Unit of	Dalradian Supergroup
Sub-units	North Sannox Grits Formation
Underlies	?Ordovician rocks
Overlies	Tayvallich Subgroup of Argyll Group
Lithology
Primary	psammite
Other	pelite, greywacke, volcanic rocks
Location
Region	Grampian Mountains
Type section
Named for	Southern Highlands

The Southern Highland Group is a sequence of metamorphosed Neoproterozoic sedimentary rocks that outcrop across the Central Highlands of Scotland, east of the Great Glen. It forms the uppermost/youngest part of the Dalradian Supergroup and is divided into two formations. Volcanism is recorded by the Loch Avich Lavas Formation which divides the Loch Avich Grits Formation into lower and upper parts – the grits are turbidite and submarine fan deposits. In Perthshire and on Deeside, the Leny Limestone, which has been dated to 514 Ma, is present. A tillite, the Macduff Boulder Bed is known from the upper part of the group in northeast Scotland.[1] [2]

References

1. Strachan, R.A., Harris, A.L., Fettes, D.J. & Smith, M. 2002 The Highland and Grampian Terranes. In: Trewin, N.H. (ed) The Geology of Scotland. The Geological Society, London pp 96-99
2. "BGS Lexicon of Named Rock Units - Result Details".