The BGS Lexicon of Named Rock Units — Result Details

Orkney Sandstone Group [Obsolete Name And Code: Use EDY]

Computer Code: OYS Preferred Map Code: OyS
Status Code: Index Level
Age range: Mid Devonian Epoch (DM) — Late Devonian Epoch (DU)
Lithological Description: Fluvial, aeolian and sabkha sediments overlying the lacustrine flagstones of the Caithness Flagstone Group. NOTE: Composite of formational type sections in northern Caithness and Orkney. Various cliff sections in the Orkney Islands.
Definition of Lower Boundary: Base of the predominantly fluvial sandstones that cut across the top of the lacustrine flagstones.
Definition of Upper Boundary: Uppermost sediments of the Orcadian Old Red Sandstone sequence. (Top everywhere eroded).
Thickness: Over 1000m.
Geographical Limits: Northern Caithness and Orkney.
Parent Unit: Not Entered (?)
Previous Name(s): Replaced By Orkney Sandstone Group (*65)
Hoy Sandstone Group [Obsolete Name And Code: Use OYS] (-4828)
Eday Group (EDY)
Old Red Sandstone, Upper (-4241)
Dunnet Head Sandstone Group (-4626)
Alternative Name(s): Eday Group
Stratotypes:
none recorded or not applicable
Reference(s):
Fletcher, T P. 1996, A review of the lithostratigraphy of the Old Red Sandstone Supergroup in Scotland north of a line from Fort William to Aberdeen. BGS Technical Report WA/96/39R. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S117