| Computer Code: |
SGAOR |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Triassic Period (T)
— Triassic Period (T) |
| Lithological Description: |
Cross-stratified conglomerates, containing cornstone, quartzite and Torridonian sandstone clasts predominate. Channels, cross-bedding and a high degree of sediment sorting indicate that fluvial deposition was likely, indicating a gradual transition to the marine conditions of the overlying Allt Dubh Member. Clasts reach a maximum size of 150mm. Not shown on 50K maps. |
| Definition of Lower Boundary: |
Cross-stratified conglomerate mark the base of the Member, above poorly-sorted conglomerates of the A'Mharagach Member. |
| Definition of Upper Boundary: |
Below marine fossil-rich sandstone beds of the Allt Dubh Member. |
| Thickness: |
9m |
| Geographical Limits: |
Sea of the Hebrides Basin/Isle of Rum. |
| Parent Unit: |
Monadh Dubh Sandstone Formation (MODS)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Reference Section |
A'Mharagach, northwest Rum. Emeleus, 1997. |
| Reference(s): |
| Emeleus, C H. 1997. Geology of Rum and the adjacent islands. Memoir (sheet) of the Geological Survey of Great Britain (Scotland) (60). (The Stationery Office for the British Geological Survey.) 171pp. |
| Steel, R J. 1974. New Red Sandstone piedmont and floodplain sedimentation in the Hebridean province, Scotland. Journal of Sedimentary Petrology, Vol.44, 336-357. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S060
|
