Corrie Lava Member

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Corrie Lava Member (CRRL), Campsie Block, Carboniferous, Midland Valley of Scotland[edit]

Corrie Lava Member is part of the Clyde Plateau Volcanic Formation.

Name[edit]

Previously named the Corrie Lavas (see Forsyth et al., 1996)[1].

Lithology[edit]

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.

Stratotype[edit]

The type area is in the south-western Kilsyth Hills, north of Glasgow (NS 6820 7909 to NS 6947 7957) (Forsyth et al., 1996)[1]. 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)[2], but neither the lower nor upper boundary is seen.

Lower and upper boundaries[edit]

The Corrie Lava Member is fault-bounded and neither the lower or upper boundary is seen.

Thickness[edit]

More than 30 m (Forsyth et al., 1996[1], table 3). Neither top nor base is seen.

Distribution and regional correlation[edit]

The member is restricted to the southern part of the Campsie Block (Forsyth et al., 1996)[1] 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)[2]. 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)[2].

Age[edit]

Mid Visean (Arundian to Asbian).

References[edit]

  1. 1.0 1.1 1.2 1.3 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)
  2. 2.0 2.1 2.2 Craig, P M. 1980. The volcanic geology of the Campsie Fells area, Stirlingshire. Unpublished PhD Thesis, University of Lancaster