| Computer Code: |
CMSA |
Preferred Map Code: |
CmSa |
| Status Code: |
Full |
| Age range: |
Callovian Age (JC)
— Callovian Age (JC) |
| Lithological Description: |
Coarse-grained (pebbles to 3cm), bioturbated sandstone. Numerous brachiopods and belemnites, many remaining only as moulds. [Thalassinoides] burrows extend into the mudstone below the Formation. |
| Definition of Lower Boundary: |
Abrupt disconformity, marine, transgressive sandstones on the mudstones of the Great Estaurine Group. |
| Definition of Upper Boundary: |
Unconformity to mudstones of the Staffin Shale Formation. |
| Thickness: |
9m+. |
| Geographical Limits: |
Sea of the Hebrides Basin. |
| Parent Unit: |
Staffin Bay Formation (STBA)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Partial Type Section |
Low cliff, Rubna na h_Airigh Baine, Loch Scavaig, southern Skye. Sykes, 1975. |
| Reference(s): |
| Morton, N and Hudson, J D, 1995. Field Guide to the Jurassic of the Isles of Raasay and Skye, Inner Hebrides, north-west Scotland. In: Taylor, P D (editor), Field Geology of the British Jurassic. Geological Society of London, 209-280. |
| Sykes, R M. 1975. The stratigraphy of the Callovian and Oxfordian stages (Middle-Upper Jurassic) in northern Scotland. Scottish Journal of Geology, Vol.11, 51-78. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S071
|
