| 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 [Obsolete Name and Code: Use MEDP]
(-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.) |
| 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
|
