The BGS Lexicon of Named Rock Units — Result Details
Forres Sandstone Group
Computer Code: | FSA | Preferred Map Code: | FSa |
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Status Code: | Full | ||
Age range: | Givetian Age (DV) — Tournaisian Age (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 [Obsolete Name and Code: Use FSA] (-4658) Upper Old Red Sandstone (UORS) |
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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 |