Computer Code: |
IBGC |
Preferred Map Code: |
IB |
Status Code: |
Full |
Age range: |
Neoproterozoic Era (AZ)
— Neoproterozoic Era (AZ) |
Lithological Description: |
Tremolite-rich calc-silicate schist with layering produced by variations in mica content. Minor semipelite. |
Definition of Lower Boundary: |
Where tremolite schist becomes dominant overlying the magnetite-semipelite of the underlying Sron Garbh Formation. Rapid transition. |
Definition of Upper Boundary: |
At the top of the highest tremolite schist unit - overlain by semipelites of the Coire Cheap Formation. |
Thickness: |
c. 60m at most. More typically 10m |
Geographical Limits: |
Ardverikie Forest between An Lairig [NN 50 77] and the Allt Mhainisteir [NN 53 86]. Sheet 63E [Dalwhinnie]. |
Parent Unit: |
Appin Group (APP)
|
Previous Name(s): |
none recorded or not applicable
|
Alternative Name(s): |
none recorded or not applicable
|
Stratotypes: |
Reference Section |
NE steep rocky shoulder of Sron Garbh. |
Type Area |
Southeast flank of Geal Charn, between Coire an Iubhair Beag and 500m NE of Loch A'Bhealaich Leambain. |
Reference(s): |
Robertson, S and Mendum, J R, in press. Lithostratigraphy of the Grampian and Appin Groups in the Dalwhinnie district, sheet 63E, Scotland. British Geological Survey Technical Report. |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
S063
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