| Computer Code: |
COCH |
Preferred Map Code: |
CC |
| Status Code: |
Full |
| Age range: |
Neoproterozoic Era (AZ)
— Neoproterozoic Era (AZ) |
| Lithological Description: |
Semipelite and pelite, schistose to gneissose and locally kyanite-rich, containing calc-silicate rock and metalimestone units. Cut by abundant amphibolite sheets. |
| Definition of Lower Boundary: |
Sharp base at the marked quartzite-pelite / semipelite boundary at the top of the Kinlochlaggan Quartzite Formation. Alternatively lies above the Kinlochlaggan 'Boulder Bed'. |
| Definition of Upper Boundary: |
Not seen ie. this is the youngest unit exposed in the major Kinlochlaggan syncline. |
| Thickness: |
Not known, but at least 200m |
| Geographical Limits: |
Ardverikie Forest between Aonach Beag [NN 455 740] and the River Spey at [NN 933 571], sheet 63E [Dalwhinnie]. |
| Parent Unit: |
Ballachulish Subgroup (DABH)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Coire Cheap on the northeast flank of Geal Charn. |
| Reference Section |
Burn section in lower part of Allt Coire Cheap. |
| Reference Section |
Burn section in lower part of Allt Liath nam Badan. |
| 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: |
|
S054
S063
|
