The BGS Lexicon of Named Rock Units — Result Details

Scalpay Sandstone Formation

Computer Code: SCS Preferred Map Code: notEntered
Status Code: Pending Upgrade
Age range: Pliensbachian Age (JE) — Toarcian Age (JT)
Lithological Description: The Scalpay Sandstone Formation comprises siltstones and sandstone, in a gradually coarsening-upwards succession to massive fine-grained sandstone. Locally cross-bedded and bioturbated. Fossiliferous horizons of Pseudopecten and other bivalves exist. The top of the formation is characterised by thin beds, ferriginous material and of chamosite-rich oolidal ironstone.
Definition of Lower Boundary: Diachronous coarsening upwards from fissile mudstone of the Pabay Shale Formation.
Definition of Upper Boundary: Abrupt lithological change to fissile mudstone of the Portree Shale Formation.
Thickness: 10m exposed
Geographical Limits: Sea of the Hebrides Basin.
Parent Unit: Lias Group (LI)
Previous Name(s): SCALPA SANDSTONE (SCS)
Alternative Name(s): none recorded or not applicable
Type Section  Rubha na Leac Peninsula, Isle of Raasay. Complete section. 
Reference Section  South of Dun Liath ruins, near Elgol, Strathaird, Skye. Partial upper section. 
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. 
Morton, N. 1965. The Bearrenaig Sandstone Series (Middle Jurassic) of Skye and Raasay. Scottish Journal of Geology, Vol.1, 189-216. 
Fyfe, J A, Long, D and Evans, D, 1993. United Kingdom offshore regional report: the geology of the Malin - Hebrides sea area (London: HMSO for the British Geological Survey). 
Hesselbo, S P, Oates, M J and Jenkyns, H C. 19998. The Lower Lias Group of the Bebrides Basin. Scottish Journal of Geology, Vol.34, Part 1, 23-60. 
Morton, N 1999. Middle Hettangian (Lower Jurassic) ammonites from the Isle of Raasay, Inner Hebrides, and correlation of the Hettangian - lowermost Sinemurian Breakish Formation in the Skye area, north-western Scotland. Scottish Journal of Geology. 
Cox, B M, Page, K N and Morton, N, 2002. The Middle Jurassic stratigraphy of Scotland. In Cox, B M and Sumbler, M G (editors), British Middle Jurassic Stratigraphy. Geological Conservation Review Series, Vol.26. (Peterborough: Joint Nature Conservation Committee/Chapman and Hall.) 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S071 S081 S044 S044 S080 S051 S052 S081