The BGS Lexicon of Named Rock Units — Result Details

Spey Conglomerate Formation

Computer Code: SPY Preferred Map Code: Spy
Status Code: Full
Age range: Mid Devonian Epoch (DM) — Mid Devonian Epoch (DM)
Lithological Description: Coarse red-bed conglomerate sequence with sporadic thin pebbly sandstone beds.
Definition of Lower Boundary: Conglomerate at base of conglomeratic sequence generally unconformably resting upon metamorphic basement. (Local Aulrothie Sandstone Member at base near Whiteash Hill).
Definition of Upper Boundary: At diachronous change to the essentially sandstone sequence (Fochabers Sandstone Formation) typically developed in the Fochabers area.
Thickness: c.200m
Geographical Limits: Not defined.
Parent Unit: Inverness Sandstone Group (INS)
Previous Name(s): Orcadian Old Red Conglomerate (-4342)
Middle Old Red Sandstone Conglomerate (-3044)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Partial Type Section  River cliffs of the River Spey, upstream of Fochabers at Craigs of Cuildell. 
Reference(s):
Peacock, J D, Berridge, N G, Harris, A L, May, F. 1968. The geology of the Elgin District. Memoir of the Geological Survey of Scotland. Sheets 86 and 96 (Scotland). (Edinburgh: HMSO). 
Hinxman, L W and Grant Wilson, J S, 1902. The geology of Lower Strathspey. Memoir of the Geological Survey, Sheet 85 (Scotland), p.58. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S085 S095 S096