| Computer Code: |
BSAL |
Preferred Map Code: |
SYMB |
| Status Code: |
Full |
| Age range: |
Neoproterozoic Era (AZ)
— Neoproterozoic Era (AZ) |
| Lithological Description: |
Schistose psammites and semipelites with minor schistose calc-silicate rock, impure carbonate rock, limestone and quartzite. |
| Definition of Lower Boundary: |
Top of graphitic pelites of the underlying Glenbuchat Graphitic Schist Formation. |
| Definition of Upper Boundary: |
Truncated by faults and shear-zones of the Portsoy Lineament. |
| Thickness: |
Up to 900m (based on outcrop width only, with no allowance for folding etc.). |
| Geographical Limits: |
100m to 1.5km-wide outcrop extending N-S from Leadensider Burn, Glenbuchat [NJ338 201] to Cairnagour Hill [NJ330 057]. Also in the Lecht-Delnadamph area, Gordon District. Sheets 75W and 75E. |
| Parent Unit: |
Easdale Subgroup (DBED)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Water of Buchat, Badenyon. |
| Reference Section |
Leadensider Burn, Badenyon. |
| Reference(s): |
| Fettes, D J, Lesley, A G, Stephenson, D and Kimbell, S F, 1991. Disruption of Dalradian stratigarphy along the Portsey Lineament from new geological and magnetic surveys. Scottish Journal of Geology, Vol.27, 57-73. |
| Memoir of the British Geological Survey, Sheet 75, in preparation. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S075
S075
|
