The BGS Lexicon of Named Rock Units — Result Details

Loch Ryan Formation

Computer Code: LRN Preferred Map Code: LRN
Status Code: Full
Age range: Permian Period (P) — Permian Period (P)
Lithological Description: Coarse breccia - conglomerate of greywacke clasts in a red sandstone matrix. Thin, discontinuous interbeds of sandstone.
Definition of Lower Boundary: Unconformable over Carboniferous strata.
Definition of Upper Boundary: No younger strata preserved.
Thickness: 134m+
Geographical Limits: Stranraer area, suoth west Scotland.
Parent Unit: Stewartry Group (STEW)
Previous Name(s): Loch Ryan Breccias [Obsolete Name And Code: Use LRN] (LRBR)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Clachan Heughs, Loch Ryan, Rhins of Galloway. 
Type Area  Exposed on west side of Loch Ryan, underlies superficial deposits on the east side of Loch Ryan and the Stravoer isthmus. Fills most of Loch Ryan sediment basin. Sheet 53. (Stranraer). 
Reference(s):
Stone, P, 1995. Geology of the Rhins of Galloway district. Memoir of the British Geological Survey, Sheets 1 & 3 (Scotland). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S001 S003