The BGS Lexicon of Named Rock Units — Result Details

Drumochter Succession

Computer Code: DRMO Preferred Map Code: DR
Status Code: Index Level
Age range: Neoproterozoic Era (AZ) — Neoproterozoic Era (AZ)
Lithological Description: Psammite and micaceous psammite, grey and flaggy, with thin micaceous partings. To the east of the A9 road typically grey to pink quartzose psammite and interbanded psammite and micaceous psammite with prominent calc-silicate rock concretions. Minor units of semipelite, locally with associated thin quartzite beds.
Definition of Lower Boundary: Not seen.
Definition of Upper Boundary: Not seen.
Thickness: Unknown.
Geographical Limits: Southeast of Loch Ericht and Glen Truim extending southwest to Loch Rannoch and northeast to Glen Tromie. In southeast part of sheet 63E [Dalwhinnie].
Parent Unit: Grampian Group (GRAM)
Previous Name(s): Drumochter Succession (DRMO)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  Craggy 200m high, south-west facing slopes of Cailleach Coire Chuirn and in the nearby burn section in the Allt Coire Chuirn, [north-west flank of A'Bhuidheanach]. 
Reference Section  Burn section in the Allt Beul an Sporain extending west of Balsporran Cottages for 1.5km. 
Reference(s):
Thomas, P R, 1980. The stratigraphy and structure of the Moine rocks north of the Schiehallion Complex, Scotland. Journal of the Geological Society, London, Vol.137, 469-482. 
Robertson, S and Merritt, J W [in prep.]. Geology of the Dalwhinnie district. Sheet description of 1:50000 sheet 63E [Scotland]. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable