The BGS Lexicon of Named Rock Units — Result Details

Druim An Fhurain Sandstone Member

Computer Code: DAFS Preferred Map Code: DafS
Status Code: Pending Upgrade
Age range: Toarcian Age (JT) — Bajocian Age (JB)
Lithological Description: Cross-bedded sandstones and sandy limestones comprise most of the Member. These are commonly either massive or thinly bedded and contain crinoid ossicles, bivalves, bryzoan, belemnites and brachiopod fragments, especially in the lower part of the succession. Limited to Straithaird peninsula, intense lateral variation.
Definition of Lower Boundary: Basal limestones resting on the Raasay Ironstone Formation or Portree Shale Formation.
Definition of Upper Boundary: Abrupt change from sandstone to mudstone of the Garantiana Shale Member.
Thickness: 480m+
Geographical Limits: Sea of the Hebrides Basin.
Parent Unit: Bearreraig Sandstone Formation (BEAS)
Previous Name(s): Raasay Sandstone Member [Obsolete Name And Code: Use DAFS] (RAAS)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  Prince Charles's Cave, Elgol, southern Skye. Morton and Hudson, 1995. 
Type Section  Faoilean, Straithaird peninsula, southern Skye. Morton and Hudson, 1995. 
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. 
Morton, N. 1965. The Bearrenaig Sandstone Series (Middle Jurassic) of Skye and Raasay. Scottish Journal of Geology, Vol.1, 189-216. 
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