The BGS Lexicon of Named Rock Units — Result Details

Penwhapple North Group [Obsolete Name And Code: Use DAI And STNG Subgroups]

Computer Code: PNO Preferred Map Code: PNO
Status Code: Index Level
Age range: Aeronian Age (SA) — Wenlock Epoch (SW)
Lithological Description: Sandstones, siltstones, mudstones, shales and turbidites. Fossiliferous bands with shelly faunas and graptolites. See constituent formations (Lower Camregan Grits, Wood Burn, Maxwellston Mudstones, Upper Camregan Grits, Penkill, Protovirgularia Grits, Lauchlan, Drumyork Flags, Blair Shale, Knockgardner, Straiton Grits.)
Definition of Lower Boundary: Disconformity with Penwhapple South Group.
Definition of Upper Boundary: Unconformably overlain by Inverclyde Group (Carboniferous).
Thickness: c.1500m
Geographical Limits: Girvan area, south west Scotland.
Parent Unit: Not Entered (?)
Previous Name(s): Dailly Series (-3973)
Newlands Series (-185)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Penwhapple Burn, Sheet SO08W. 
Reference(s):
Lapworth, C, 1882. The Girvan Succession. Quarterly Journal of the Geological Society of London, Vol. 38, 537-666. 
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. 
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. 
Cameron, I B, Stone, P and Smellie, J, 1986. Geology of the Country around Girvan. Explanation of 1:50 000 sheet. British Geological Survey, Sheet 7, Scotland. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S008 S007 S014