The BGS Lexicon of Named Rock Units — Result Details

The Bastard Sandstone Formation

Computer Code: BAT Preferred Map Code: BAT
Status Code: Full
Age range: Pragian Age (DP) — Pragian Age (DP)
Lithological Description: A finely laminated, locally cross-bedded sandstone, more quartzose than the underlying formation.
Definition of Lower Boundary: The top of the New Orleans Conglomerate Formation.
Definition of Upper Boundary: Not seen as dips into the sea, elsewhere on Kintyre it is unconformably overlain by the Stratheden Group.
Thickness: At least 100 m thick.
Geographical Limits: South of Campbeltown on the Kintyre Peninsula on Sheet 12, excluding Sanda and neighbouring islands.
Parent Unit: Arbuthnott-Garvock Group (ATGK)
Previous Name(s): none recorded or not applicable
Alternative Name(s): Am Binnein Formation
Type Section  Sea cliffs around The Bastard 
Morton, D J, 1979. Palaeogeographical evolution of the Lower Old Red Sandstone Basin in the western Midland Valley. Scottish Journal of Geology, Vol.15, 97-116, Fig.1 
Friend, P F and MacDonald, R, 1968. Volcanic sediments, stratigraphy and tectonic background of the Old Red Sandstone of Kintyre, west Scotland. Scottish Journal of Geology, Vol.4, p.265-282. 
1:50K maps on which the lithostratigraphical unit is found, and map code used: