Computer Code: |
BRPS |
Preferred Map Code: |
Brur |
Status Code: |
Full |
Age range: |
Neoproterozoic Era (AZ)
— Neoproterozoic Era (AZ) |
Lithological Description: |
[Obsolete: use GCKP] Psammite, both thickly-bedded quartz-rich types with quartzite layers, and thinly bedded laminated feldspathic types. Contains a few mappable semipelite and pelite units. |
Definition of Lower Boundary: |
Base not exposed in core of Meall Reamhar Synform; north of Allt a'Chireachan may pass downwards into Drumochter Succession. |
Definition of Upper Boundary: |
Gradational boundary with overlying Tummel Quartzite Formation. |
Thickness: |
>600m |
Geographical Limits: |
In core of Meall Reamhar Synform from near Dalriach [NN 745 595] via Calvine [NN 805 658] and the Water of Bruar to at least the northern margin of Sheet 55W. Also extends westwards at least as far as the Allt a'Chireachain [NN 756 710 - 787 730]. Individual formations are not recognised in the north-western part of Sheet 55W. |
Parent Unit: |
none recorded or not applicable
|
Previous Name(s): |
Included In Drumochter Succession
(-86)
|
Alternative Name(s): |
Drumochter Succession
|
Stratotypes: |
Type Section |
Bruar Water from 100m downstream of A9 road extending upstream for about 2.5km. |
Reference(s): |
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. 2001. Solid geology of the Schiehallion district. Memoir of the British Geological Survey, Sheet 55W (Scotland). |
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. |
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. |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
S055
S055
|