| Computer Code: |
FCYSD |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Callovian Age (JC)
— Kimmeridgian Age (JD) |
| Lithological Description: |
Intensely bioturbated fine-grained muddy sandstone in several fining-upward cycles, rich in ammonites and bivalves, that culminate in a massive sandy siltstone. Dinoflagellate cysts are abundant (Riding, 2005). |
| Definition of Lower Boundary: |
Overlies the Fascally Siltstone Member (FCYSI). |
| Definition of Upper Boundary: |
Overlain by the Clynelish Quarry Sandstone Member (CLYNQ). |
| Thickness: |
6.5 m. |
| Geographical Limits: |
Onshore area around Brora, on the Moray Firth, north-east Scotland. |
| Parent Unit: |
Clynekirkton Sandstone Formation (CYK)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
North bank of the River Brora [NC 899 040]. |
| Reference(s): |
| Riding, J B. 2005. Middle and Upper Jurassic (Callovian to Kimmeridgian) palynology of the onshore Moray Firth Basin, northeast Scotland. Palynology, Vol. 29, 87-142. |
| Barron, A J M, Lott, G K, and Riding, J B. 2012. Stratigraphical framework for the Middle Jurassic strata of Great Britain and the adjoining continental shelf. British Geological Survey Research Report RR/11/06. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
