| Computer Code: |
DUNSH |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Callovian Age (JC)
— Callovian Age (JC) |
| Lithological Description: |
Locally nodular mudstone. |
| Definition of Lower Boundary: |
Abruptly overlies the fine- to medium-grained sandstone of the Belemnite Sands Member (BSSK), Staffin Bay Formation (STBA). |
| Definition of Upper Boundary: |
Overlain by the Dunans Clay Member (DUNCL). |
| Thickness: |
none recorded or not applicable
|
| Geographical Limits: |
Trotternish district, Skye, north-west Scotland. |
| Parent Unit: |
Staffin Shale Formation (SFSH)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Foreshore of Staffin Bay, Trotternish, northern Skye [NG 472 708] – Point 5 of Morton and Hudson (1995, fig. 38). |
| Reference(s): |
| 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. |
| 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. |
| 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. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
