| Computer Code: |
BKIL |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Tonian Period (AT)
— Tonian Period (AT) |
| Lithological Description: |
Psammite, dark-grey, with semipelitic layers. Commonly striped appearance. Semipelite layers are up to 1 m thick, are garnetiferous, and comprise <40% of the sequence. Locally contains remnants of cross-bedding. |
| Definition of Lower Boundary: |
Overlies the remainder of Glascarnoch Psammite Formation (or: locally the 'Boc Nor Psammite'. Gradational boundary where pale coloured psammite grades into dark-grey psammite of the Ben Killilan Psammite Member. |
| Definition of Upper Boundary: |
Stratigraphic top not known: cut by the overlying Sgurr Beag Thrust. |
| Thickness: |
none recorded or not applicable
|
| Geographical Limits: |
NW Highlands: Kintail; NW of the Strahconon Fault. |
| Parent Unit: |
Glascarnoch Psammite Formation (GLPS)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| none recorded or not applicable |
| Reference(s): |
| May, F, Peacock, J, Smith, D, and Barber, A. 1993. Geology of the Kintail district. Memoir for the 1: 50 000 sheet 72W and part of 71E (Scotland). (British Geological Survey.) |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
