The BGS Lexicon of Named Rock Units — Result Details

Drumyork Flags Formation

Computer Code: DYF Preferred Map Code: DYF
Status Code: Full
Age range: Llandovery Epoch (SL) — Llandovery Epoch (SL)
Lithological Description: Grey-green sandstone, flaggy towards top.
Definition of Lower Boundary: Rests conformably on Lauchlan Formation.
Definition of Upper Boundary: Conformably overlain by Blair Shale.
Thickness: 610m
Geographical Limits: Girvan area, south-west Scotland.
Parent Unit: Dailly Subgroup (DAI)
Previous Name(s): Drumyork Flags [Obsolete Name And Code: Use DYF] (DYFC)
Blackwood Beds [Obsolete Name And Code: Use (Part Of) DYF] (BWD)
Glenfoot Beds [Obsolete Name And Code: Use (Part Of) DYF] (GLFT)
Bargany Formation [Obsolete Name And Code: Use (Part Of) DYF] (BGY)
Alternative Name(s): none recorded or not applicable
Reference Section  Lauchlan Burn, Girvan. 
Type Section  Penwhapple Burn, Girvan. 
Lapworth, C, 1882. The Girvan Succession. Quarterly Journal of the Geological Society of London, Vol. 38, 537-666. 
Floyd, J D and Williams, M. 2003. A revised correlation of Silurian rocks in the Girvan district, SW Scotland. Transactions of the Royal Society of Edinburgh: Earth Sciences, Vol. 93 (for 2002), 383-92. 
Cocks, L R M and Toghill, P, 1973. The biostratigraphy of the Silurian rocks of the Girvan District, Scotland. Journal of the Geological Society of London, Vol. 129, 209-243. 
1:50K maps on which the lithostratigraphical unit is found, and map code used: