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 |