The BGS Lexicon of Named Rock Units — Result Details

Scresort Sandstone Member

Computer Code: TCAS Preferred Map Code: notEntered
Status Code: Full
Age range: Neoproterozoic Era (AZ) — Neoproterozoic Era (AZ)
Lithological Description: Medium- to coarse-grained sandstones containing "exotic" pebbles, and displaying abundant cross-stratification and soft-sediment convolution structures; fine-grained sandstones, siltstones and mudstones are subordinate.
Definition of Lower Boundary: The 'first' (stratigraphically lowest) thickly-bedded, cross stratified and/or convoluted coarse-grained sandstone (arkose) bed containing 'exotic' pebbles characteristic of the Applecross Formation. (NM 4108 9751 or NM 4155 9905).
Definition of Upper Boundary: Marked by the disappearance of 'exotic' pebbles characteristic of the Applecross Formation (NM 3769 9147 or NG 3360 0247).
Thickness: Total thickness (from NG 4230 0014 to NG 3270 0200) of c.2000m +/- 500m (allowing for uncertainty in fault displacements).
Geographical Limits: Isle of Rum, Loch Scresort.
Parent Unit: Applecross Formation (TCA)
Previous Name(s): Guirdil Arkose (-3074)
Rudha Na Roinne Grit (-1222)
Loch Nan Eala Arkose (-1223)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Isle of Rum, Loch Scresort. 
Reference(s):
Black, G P and Welsh, W, 1961. The Torridonian succession of the Isle of Rhum. Geological Magazine, Vol.98, 265-276. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S060