The BGS Lexicon of Named Rock Units — Result Details

Glenwhan Formation [Obsolete Name And Code: Use PPF]

Computer Code: GLWH Preferred Map Code: GLWH
Status Code: Index Level
Age range: Caradoc Series (O4) — Ashgill Series (OA)
Lithological Description: Mainly thick-bedded greywackes. Rich in ferromagnesian minerals, poor in quartz.
Definition of Lower Boundary: Faulted against Boreland Formation.
Definition of Upper Boundary: Faulted against Lochryan Formation.
Thickness: Not defined.
Geographical Limits: Not defined.
Parent Unit: Leadhills Supergroup (LHG)
Previous Name(s): none recorded or not applicable
Alternative Name(s): Portpatrick Formation
Stratotypes:
Type Area  Craig Fell, Sheet S3 (Stranraer). 
Reference(s):
Walton, E K. 1983. Lower Palaeozoic - Stratigraphy. In Craig, G Y (editor), Geology of Scotland (2nd edition)(Edinburgh: Scottish Academic Press.) 
Welsh, W. Not published. The Ordovician rocks of northwest Wigtownshire. Ph.D. Thesis, University of Edinburgh, 1964. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S003