The BGS Lexicon of Named Rock Units — Result Details

Glenburn Volcaniclastic Member

Computer Code: GBV Preferred Map Code: GBV
Status Code: Full
Age range: Visean Stage (CV) — Visean Stage (CV)
Lithological Description: Volcaniclastic sandstones and siltstones, purple brown and well bedded. In the Glenburn Borehole volcaniclastic sedimentary rocks and agglomerates are interbedded with several (thin) lava flows.
Definition of Lower Boundary: The lower boundary was penetrated by the BGS Glenburn Borehole [2478 6607] which shows that the lavas with interbedded volcaniclastic sedimentary rocks rest upon the Kinneswood Formation.
Definition of Upper Boundary: In a waterfall at Craigie Linn [2475 6605] the vocaniclastic sedimentary rocks are overlain by a massive flow of plagioclase-microphyric basalt (Jedburgh type) which here marks the base of the Gleniffer Lava Member. Elsewhere the unit is overlain by the distinctive olivine-bearing plagioclase-macrophyric basalts (Markle type) that are characteristic of the overlying Gleniffer Lava Member.
Thickness: 30m+
Geographical Limits: The Glenburn Volcaniclastic Member is exposed at intervals along the base of the lava scarp on the northern edge of the Beith - Barrhead lava block, from Craigie Linn [NS 475 605] in the Glen Park, Paisley to Harelaw Burn [NS 492 600].
Parent Unit: Clyde Plateau Volcanic Formation (CPV)
Previous Name(s): Glen Park Volcanic Detrital Member [Obsolete Name And Code: Use GBV] (GPVD)
Glen Park Volcanic Detrital Member (*782)
Glenburn Volcanic Detrital Member [Obsolete Name And Code: See GPVD] (-4070)
Alternative Name(s): Glen Park Volcanic Detrital Member
Stratotypes:
Reference Section  The BGS Glenburn Borehole penetrates the volcaniclastic sedimentary rocks and lavas of the Glenburn Vocaniclastic Member. A geological description of the borehole is available. IGS, 1981 
Type Section  Glenburn Borehole within Glen Park, BGS Borehole NS46SE/164, 17.35 m to 22.85m depth. 
Partial Type Section  Bed of Craigie Linn within Glen Park, Paisley, Scotland. 
Reference(s):
Hall, I H S, Browne, M A E and Forsyth, I H. 1998. Geology of the Glasgow district. Memoir of the British Geological Survey, Sheet 30E (Scotland). 
Institute of Geological Sciences 1981. IGS Boreholes 1980. Report Institute of Geological Sciences (Great Britain) 81/11 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S030