The BGS Lexicon of Named Rock Units — Result Details

Forres Sandstone Group

Computer Code: FSA Preferred Map Code: FSa
Status Code: Full
Age range: Givetian Age (DV) — Tournaisian Stage (CT)
Lithological Description: Red-bed sandstones with rare siltstones, some pebbly beds and 'cornstones'.
Definition of Lower Boundary: Disconformity at base of Nairn Sandstone on Inverness Sandstone Group beds. Base is transgressive onto metamorphic basement.
Definition of Upper Boundary: At the change in facies from red beds to marine sedimentary rocks.
Thickness: About 1000 m thick.
Geographical Limits: Ardersier to Spey Bay (near Buckie)
Parent Unit: Old Red Sandstone Supergroup (ORS)
Previous Name(s): Upper Old Red Sandstone (UORS)
Findhorn Sandstone Group (-4658)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Outcrops between Ardersier/Nairn and Buckie, southern side of Moray Firth. Component formations: Nairn Sandstone, Whitemire-Bogside(Edenkillie) Beds, Alves Beds, Scaat Craig Beds, Cornstone Beds and Rosebrae Beds. 
Reference(s):
Fletcher, T P et al. 1996. Geology of the Fortrose and eastern Inverness district. Memoir of the British Geological Survey, Sheet 84W (Scotland). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S084 S085 S085 S095 S094 S094 S084