The BGS Lexicon of Named Rock Units — Result Details

Leswalt Formation [Obsolete Name And Code: Use CMSC]

Computer Code: LWT Preferred Map Code: LWT
Status Code: Index Level
Age range: Westphalian Stage (CW) — Westphalian Stage (CW)
Lithological Description: Grey, red and mottled yellow-brown sandstones interbedded with purple-grey shales containing plant fragments, and rare seatclays.
Definition of Lower Boundary: Angular unconformity over steeply inclined Lower Palaeozoic greywackes.
Definition of Upper Boundary: Unconformably overlain by Permian breccias.
Thickness: c.30m
Geographical Limits: Rhins of Galloway, south west Scotland.
Parent Unit: Scottish Coal Measures Group (CMSC)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Type Area  Intermittently exposed in a narrow, north-south strip for 7km to the north and to the south (14 km in all) of Leswalt. Sheet S3 (Stranraer). 
Type Section  Lochans to Jamieson's Point, Rhins of Galloway. 
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