| Computer Code: |
SQS |
Preferred Map Code: |
SqS |
| Status Code: |
Full |
| Age range: |
Eifelian Age (DI)
— Eifelian Age (DI) |
| Lithological Description: |
Pebbly sandstone with medium to thick-bedded, predominantly fluvial sandstones in four bodies. |
| Definition of Lower Boundary: |
Transgressive sandstone base in flagstone sequence of siltstones. |
| Definition of Upper Boundary: |
Base of blackish laminite mudstone at base of lacustrine rhythm number 36 of Astin, 1990. |
| Thickness: |
17m on Sacquoy Head, Rousay Island, Orkney. |
| Geographical Limits: |
Orkney Islands. |
| Parent Unit: |
Upper Stromness Flagstone Formation (USF)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Cliff section on south side of Sacquoy Head, Rousay Island, Orkney. |
| Reference(s): |
| Astin, T R. 1990. The Devonian lacustrine sediments of Orkney etc. Quarterly Journal of the Geological Society of London, Vol. 147, 141-151. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S119
S121
S121
S122
|
