The BGS Lexicon of Named Rock Units — Result Details

Shannochill Sandstone Member

Computer Code: SHAS Preferred Map Code: SHS
Status Code: Full
Age range: Early Devonian Epoch (DL) — Early Devonian Epoch (DL)
Lithological Description: Sandstone, grey-brown to reddish brown to purple., fine- to medium-grained, lithic, locally micaceous, commonly planar bedded, rare sandy siltstone beds, coarsening north-eastwards from Glenny Burn [NN 5700 0213].
Definition of Lower Boundary: The sharp contact at the top of the Gartartan Conglomerate Member of the Ruchill Flagstone Formation.
Definition of Upper Boundary: North-east of Malling [NN 5625 0065], seen as a diachronous transition to the Malling Conglomerate Member, south of Malling, there is a diachronous transition to the undivided Cromlix siltstone facies.
Thickness: Up to 300 m near Arntamie [NN 565 010].
Geographical Limits: The north-west limb of the Strathmore Syncline, from Shannochill [NS 542 992] to north-east of Lochan Balloch, probably re-appearing in Keltie Water, north-east of Callander.
Parent Unit: Cromlix Mudstone Formation (CXF)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Partial Type Section  Yard of Over Shannochill Farm, located on bedrock. 
Reference Section  Tributary of Glenny Burn, 550m above confluence. 
Reference(s):
Phillips, E R and Aitken, A M. 1998. The petrology and composition of the Lower Old Red Sandstone exposed in the Aberfoyle Area (Sheet 38E), Central Scotland. British Geological Survey, Technical Report, WG/98/10. 
Browne, M A E, Smith, R A and Aitken, A M. 2001. A lithostratigraphical framework for the Devonian (Old Red Sandstone) rocks of Scotland south of a line from Fort William to Aberdeen. Version 3. British Geological Survey Research Report RR/01/04. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S038