The BGS Lexicon of Named Rock Units — Result Details

Dalmary Sandstone Member

Computer Code: DASA Preferred Map Code: DAS
Status Code: Full
Age range: Early Devonian Epoch (DL) — Early Devonian Epoch (DL)
Lithological Description: A greenish grey, fine- to coarse-grained, lithic sandstone, commonly with rip-up mudstone clasts, characterised by beds locally rich in plant remains.
Definition of Lower Boundary: A transitional contact, showing interbedding with the Cromlix Mudstone Formation, eg. in the Brocklin Falls Conglomerate Member in the Burn of Mar [NS 442 909], and locally a sharp contact, such as in Kelty Water [NS 5016 9503].
Definition of Upper Boundary: A transitional contact with the Buchlyvie Sandstone Member of the Teith Sandstone Formation, which is reddish grey, unfossiliferous and contains red siltstone and mudstone interbeds.
Thickness: Up to 1500 m thick.
Geographical Limits: The north-west limb of the Strathmore Syncline, from Auchensail, Cardross [NS 342 798] to the southern slopes of Bheag near Callander, and as far as the Arrevore Burn [NN 775 126].
Parent Unit: Teith Sandstone Formation (THF)
Previous Name(s): Grey Sandstone Facies (-189)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  Small cliff in Ward Burn. 
Reference Section  Former quarry used in construction of Buchanan Castle, Drymen, located 500m north-west of the same. 
Partial Type Section  Kelty Water at bridge near Chapelarroch Farm. 
Reference(s):
Armstrong, M and Paterson, I B, 1970. The Lower Old Red Sandstone of the Strathmore Region. Report of the Institute of Geological Sciences No.70/12 
Francis, E H, Forsyth, I H, Read, W A and Armstrong, M. 1970. The geology of the Stirling district. Memoir of the Geological Survey of Great Britain, Sheet 39 (Scotland). 
Henderson, S M K, 1932. Notes on Lower Old Red Sandstone plants from Callander, Perthshire. Transactions of the Royal Society of Edinburgh, Vol.57, 277-285. 
Jack, R L and Etheridge, R, 1877. On the discovery of plants in the Lower Old Red Sandstone of the neighbourhood of Callander. Quarterly Journal of the Geological Society of London, Vol.33, 213-222. 
Lang, W H, 1932. Contributions to the study of the Old Red Sandstone flora of Scotland. VIII. On Arthrostigma, Psilophyton, and some associated plant remains from the Strathmore Beds of the Caledonian Lower Old Red Sandstone. Transactions of the Royal Society of Edinburgh, Vol.57, 491-521. 
Owens, B and Richardson, J B, 1972. Some recent advances in Devonian palynology - a review. Compte Rendu 7e Congres International de Stratigraphie et de Geologie du Carbonifere, Krefeld, 1971, Vol.1, 325-343. 
Scott, A C, Edwards, D and Rolfe, W D I, 1976. Fossiliferous Lower Old Red Sandstone near Cardross, Dunbartonshire. Proceedings of the Geological Society of Glasgow, Vol.117, 4-5. 
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