The BGS Lexicon of Named Rock Units — Result Details

Meall Dubh Striped Pelite Formation

Computer Code: MEDP Preferred Map Code: MeDS
Status Code: Full
Age range: Neoproterozoic Era (AZ) — Neoproterozoic Era (AZ)
Lithological Description: Schistose muscovite-biotite pelite with delicately striped alternations of fine-grained psammite; becomes slightly calcareous near top.
Definition of Lower Boundary: Apparently transitional boundary with Beoil Schist highly tectonised.
Definition of Upper Boundary: Boundary with Meall Dubh Limestone Formation probably transitional over a few metres.
Thickness: 3 - 30m in Sheet 55W; much tectonic thinning compared with Leven Schist.
Geographical Limits: Main development in Strath Fionan [NN 7257 7556]. Also occurs sporadically as far west as Allt na Moine Buidhe [NN 708 612] and as far east as Allt Kynachan [NN 7790 5725]. Not present east of the Loch Tay Fault, where it may have been tectonically excised; however some of the rocks of the 'Banvie burn Series' may be equivalent.
Parent Unit: Lochaber Subgroup (DALO)
Previous Name(s): Meall Dubh Striped Pelite (-2939)
Alternative Name(s): Leven Schist
Stratotypes:
Type Section  On north side of road through Strath Fionan, at northern end of transect B-B', Fig.4 of Treagus, J E. 2001. 
Reference(s):
Harris, A L, Haselock, P J, Kennedy, M J and Mendum, J R, 1994. The Dalradian Supergroup in Scotland, Shetland and Ireland. 33-53 in Gibbons, W E and Harris, A L (editors). A revised correlation of Precambrian rocks in the British Isles. Special Report of the Geological Society, London, No.22. 
Stephenson, D and Gould, D , 1995. British Regional Geology: the Grampian Highlands (4th edition). (London: HMSO for the British Geological Survey), 67-68. 
Treagus, J E and King, G, 1978. A complete Lower Dalradian succession in the Schiehallion district, central Perthshire. Scottish Journal of Geology, Vol.14, 157-166. 
Treagus, J E. 2001. Solid geology of the Schiehallion district. Memoir of the British Geological Survey, Sheet 55W (Scotland). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S055