The BGS Lexicon of Named Rock Units — Result Details

Crawton Volcanic Formation

Computer Code: CVF Preferred Map Code: CVF
Status Code: Full
Age range: Silurian Period (S) — Early Devonian Epoch (DL)
Lithological Description: Macroporphyritic shoshonite lavas, aphyric and microporphyritic olivine basalt and basaltic andesite lavas, tuffs and volcaniclastic sedimentary rocks.
Definition of Lower Boundary: The base of the lowest lava or tuff overlying the Whitehouse Conglomerate Formation or the Gourdon Sandstone Formation.
Definition of Upper Boundary: The top of the lava or tuff underlying the Catterline Conglomerate Formation.
Thickness: Up to 270 m thick.
Geographical Limits: Stonehaven to Gourdon, and in the north-west limb of the Strathmore Syncline between Stonehaven and Dunkeld.
Parent Unit: Not Applicable (-)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Coastal section at Crawton Bay. 
Reference(s):
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. 
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 
Campbell, R, 1913. The geology of south-eastern Kincardineshire. Transactions of the Royal Society of Edinburgh, Vol.48, pp.923-960. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S067 S056