| Computer Code: |
WROS |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Tonian Period (AT)
— Tonian Period (AT) |
| Lithological Description: |
Dominated by sandstone (or psammite), with subsidiary conglomerate and mudstone (or semipelite, pelite). |
| Definition of Lower Boundary: |
Unconformably overlying Lewisian Gneiss or (locally) Stoer Group. |
| Definition of Upper Boundary: |
Inferred to be uncomformably overlain by the Loch Ness Supergroup. In practice, uncomformably overlain by Cambrian Ardvreck Group (west of the Moine Thrust) or cut by the Sgurr Beag Thrust (east of the Moine Thrust). |
| Thickness: |
Greater than 6 km possibly, possibly as much as 9 km. |
| Geographical Limits: |
Northern Highlands from Iona to Sutherland; Shetland. |
| Parent Unit: |
Not Applicable (-)
|
| 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. |
| Krabbendam M, Strachan R A, Prave A. 2021. A new stratigraphic framework for the early Neoproterozoic successions of Scotland. Journal of the Geological Society of London. doi:10.1144/jgs2021-054 |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
