Corrie Lava Member
Corrie Lava Member is part of the Clyde Plateau Volcanic Formation.
Previously named the Corrie Lavas (see Forsyth et al., 1996).
The Corrie Lava Member consists of plagioclase-macrophyric basalt and trachybasalt lavas (‘Markle’ type), aphyric basaltic-trachyandesite (mugearite) lava, and lapilli-tuff and tuff-breccia beds.
The type area is in the south-western Kilsyth Hills, north of Glasgow (NS 6820 7909 to NS 6947 7957) (Forsyth et al., 1996). A reference section is an unnamed burn crossing the escarpment north of Corrie, south-western Kilsyth Hills (NS 6904 7939 to NS 6892 7966) (Craig, 1980), but neither the lower nor upper boundary is seen.
Lower and upper boundaries
The Corrie Lava Member is fault-bounded and neither the lower or upper boundary is seen.
More than 30 m (Forsyth et al., 1996, table 3). Neither top nor base is seen.
Distribution and regional correlation
The member is restricted to the southern part of the Campsie Block (Forsyth et al., 1996) and specifically to the southern side of the south-western Kilsyth Hills, north of Glasgow. The outcrop is bounded to the south by the Campsie Fault, to the north by the Bachille Fault and to the north-east by the East Bachille Fault (Craig, 1980). These rocks crop out in faulted ground below the escarpment on the southern side of the Kilsyth Hills, north-west of Kilsyth, from the west of Corrie Plantation (NS 6820 7909), eastwards to the north-east of Corrie (NS 6952 7957). Derivation is thought to have been from local vents (Craig, 1980).
Mid Visean (Arundian to Asbian).
- Forsyth, I H, Hall, I H S, and McMillan, A A. 1996. Geology of the Airdrie district. Memoir of the British Geological Survey, Sheet 31W (Scotland)
- Craig, P M. 1980. The volcanic geology of the Campsie Fells area, Stirlingshire. Unpublished PhD Thesis, University of Lancaster