The BGS Lexicon of Named Rock Units — Result Details

Inverness Sandstone Group

Computer Code: INS Preferred Map Code: InS
Status Code: Full
Age range: Mid Devonian Epoch (DM) — Mid Devonian Epoch (DM)
Lithological Description: Red sandstone sequence incorporating the Daviot Conglomerate, Nairnside Sandstone, Leanach Sandstone, Inshes Flagstone and Hillhead Sandstone formations.
Definition of Lower Boundary: Unconformable base of Old Red Sandstone sequence.
Definition of Upper Boundary: Unconformable base of the Nairn Beds.
Thickness: 1000m+
Geographical Limits: Inverness - Nairn.
Parent Unit: Old Red Sandstone Supergroup (ORS)
Previous Name(s): Middle Old Red Sandstone (-62)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Area to south-east of Great Glen Fault. 
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:
S096 S073 S073 S083 S084 S097 S096 S086 S084 S095