The BGS Lexicon of Named Rock Units — Result Details

Glenramskill Formation

Computer Code: GRK Preferred Map Code: GRK
Status Code: Full
Age range: Lochkovian Age (DO) — Lochkovian Age (DO)
Lithological Description: Conglomerates, breccias and sandstones all composed of dominantly Dalradian Supergroup rocks.
Definition of Lower Boundary: Unconformity on Dalradian Supergroup metasediments, with localised thin basal breccia.
Definition of Upper Boundary: The base of the New Orleans Conglomerate Formation.
Thickness: Comprises the Basal Breccia member at approximately 110 m thick which is overlain by the Quartzite Conglomerate member which is about 330m thick, to giving a total unit thickness of 440 m at type section.
Geographical Limits: The Kintyre peninsula, south of Peninver [NR 762 253], but excluding Sanda and neighbouring islands, on Sheet 12.
Parent Unit: Arbuthnott-Garvock Group (ATGK)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Coast section on the south shore of Campbeltown Loch, from near Glenramskill House to the east end of the sands, joining Davaar Island to the mainland. 
Reference(s):
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:
S012