| Computer Code: |
NHGN |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Tonian Period (AT)
— Tonian Period (AT) |
| Lithological Description: |
Strongly gneissose psammite, with muscovite, biotite and garnet; pegmatitic granite veins are common. |
| Definition of Lower Boundary: |
Likely overlying the Orknagable Formation (ORKG). |
| Definition of Upper Boundary: |
Likely overlain by Kirkaby Gneiss Formation (KIGN). |
| Thickness: |
none recorded or not applicable
|
| Geographical Limits: |
NE Shetland: Unst, Fetlar, Linga. |
| Parent Unit: |
Westing Group (WEGP)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| none recorded or not applicable |
| Reference(s): |
| Krabbendam, M. 2021. A stratigraphic framework for the early Neoproterozoic successions of the Northern Highlands of Scotland. UK Stratigraphic Framework Series. British Geological Survey Open Report, OR/21/072. 86pp. |
| Flinn, D. 2014. Geology of Unst, Fetlar and adjacent islands. Memoir of the British Geological Survey, Sheets 131 and part of 130, Scotland. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S131
|
