| Computer Code: |
SAPE |
Preferred Map Code: |
SYMB |
| Status Code: |
Full |
| Age range: |
Tonian Period (AT)
— Tonian Period (AT) |
| Lithological Description: |
Gneissose pelite, garnetiferous, minor semipelite layers. Locally contains staurolite and kyanite. Strongly deformed. |
| Definition of Lower Boundary: |
Conformably upon the Lower Shiaba Psammite Formation (LSHP). |
| Definition of Upper Boundary: |
Conformably overlain by the Upper Shiaba Psammite Formation (USHP). |
| Thickness: |
c. 130 m (estimate - post-deformational thickness). |
| Geographical Limits: |
Ross of Mull, Isle of Mull, Inner Hebrides. |
| Parent Unit: |
Morar Group (MORR)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Coastal section on Ross of Mull, NE of Rubha nam Braihrean [NM 441 183 - NM 440 181]. |
| Reference(s): |
| Holdsworth, R E, Harris, A L and Roberts, A M, 1987. The stratigraphy, structure and regional significance of the marine rocks of Mull, Argyllshire, west Scotland, Geological Journal, Vol.22, 83-107. |
| 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. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S043
|
