| Computer Code: |
WKSZ |
Preferred Map Code: |
symbol |
| Status Code: |
Full |
| Age range: |
Ordovician Period (O)
— Silurian Period (S) |
| Lithological Description: |
Blastomylonite, derived from Wilgi Geos Group and Sand Voe Group rocks. |
| Definition of Lower Boundary: |
The shear zone is probably a thrust that has juxtaposed Sand Voe Group rocks , that may be equivalent of the Moine Supergroup, against the Wilgi Geos Group of the Lewisian Gneiss Complex. |
| Definition of Upper Boundary: |
Not applicable. |
| Thickness: |
The blastomylonite is of mappable thickness. |
| Geographical Limits: |
The unit extends about 5 km from Garmus Taing on the north coast of Northmaven to Pettadale Water, and is then offset by faulting about 2 km to the east, then continues another 2 km until it abuts the Ronas Hill and Eastern granites. |
| Parent Unit: |
Not Applicable (-)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Garmus Taing to Pettadale Water, North Maven. Mykura, 1976. |
| Reference(s): |
| British Geological Survey. 2004. Northmaven, Scotland Sheet No. 129, 1:50,000 scale. |
| Mykura W, 1976 British Regional Geology: Orkney and Shetland (HMSO, Edinburgh).] |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S129
|
